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Mathematical function
+ y ) = cn ( x ) cn ( y ) − sn ( x ) sn ( y ) dn ( x ) dn ( y ) 1 − m sn 2 ( x ) sn 2 ( y ) , sn ( x + y ) = sn ( x ) cn ( y ) dn
Jacobi_elliptic_functions
Supernova in the constellation Cassiopeia
SN 1572 (also Tycho's Star, Tycho's Nova, or Tycho's Supernova), or B Cassiopeiae (B Cas), was a supernova of Type Ia in the constellation Cassiopeia,
SN_1572
Supernova in the spiral galaxy Messier 81
SN 1993J was a supernova in Bode's Galaxy. It was discovered on 28 March 1993 by amateur astronomer Francisco Garcia Diaz in Lugo, Spain. At the time,
SN_1993J
Chemical element with atomic number 50 (Sn)
Tin is a chemical element; it has the symbol Sn (from Latin stannum) and atomic number 50. A metallic-gray metal, tin is soft enough to be cut with little
Tin
1987 supernova event in the constellation Dorado
SN 1987A was a Type II supernova in the Large Magellanic Cloud, a dwarf satellite galaxy of the Milky Way. It occurred approximately 51.4 kiloparsecs (168
SN_1987A
Possible supernova from an Eta Carinae analog star
; Peng, Chien Y.; King, Jennifer Y.; Filippenko, Alexei V.; Treffers, Richard R.; Li, Weidong; Richmond, Michael W. (December 2000). "SN 1997bs in M66:
SN_1997bs
Supernova in Messier 82
SN 2014J was a Type-Ia supernova in Messier 82 (the 'Cigar Galaxy', M82) discovered in mid-January 2014. It was the closest Type-Ia supernova discovered
SN_2014J
Mathematical functions
elliptic functions on that lattice, sl z = sn ( z ; − 1 ) , {\displaystyle \operatorname {sl} z=\operatorname {sn} (z;-1),} cl z = cd ( z ; − 1 ) {\displaystyle
Lemniscate_elliptic_functions
Astrophysical phenomenon
N.; Griffith, C. V.; Joubert, N.; Lee, N. Y.; Lowe, T. B.; Mobberley, M. P.; Winslow, D. M. (2009). "Sn 2008S: A Cool Super-Eddington Wind in a Supernova
Supernova
Chemical compound
solid with the formula SnCl2. It forms a stable dihydrate, but aqueous solutions tend to undergo hydrolysis, particularly if hot. SnCl2 is widely used as
Tin(II)_chloride
Possible supernova in 393 AD and it is in Scorpius
SN 393 is the modern designation for a probable supernova that was reported by the Chinese in the year 393 CE. An extracted record of this astronomical
SN_393
Type of group in abstract algebra
themselves be An or Sn). Sn acts on its subgroup An by conjugation, and for n ≠ 6, Sn is the full automorphism group of An: Aut(An) ≅ Sn. Conjugation by even
Symmetric_group
curve is: y 2 + 2 a y 1 + y ′ 2 = b 2 {\displaystyle y^{2}+{\frac {2ay}{\sqrt {1+y'^{2}}}}=b^{2}} . Its parametric equation is: x ( u ) = a sn ( u , k
Nodary
Vector used in astronomy
coordinates (χ, ψ, φ) η w = cn χ cn ψ , η x = sn χ dn ψ cos ϕ , η y = sn χ dn ψ sin ϕ , η z = dn χ sn ψ , {\displaystyle {\begin{aligned}\eta
Laplace–Runge–Lenz_vector
Supernova in the constellation Sextans
SN 1000+0216 was an extremely remote hypernova or superluminous supernova (SLSN), which occurred in between June and November 2006 in the constellation
SN_1000+0216
Chemical compound
SN-38 is an antineoplastic drug. It is the active metabolite of irinotecan (an analog of camptothecin - a topoisomerase I inhibitor) but has 1000 times
SN-38
Unusual Type Ia supernova in the constellation Böotes
SN 2003fg, nicknamed the Champagne Supernova, was an unusual Type Ia supernova. It was discovered on 24 April 2003 with the Canada-France-Hawaii Telescope
SN_2003fg
Pharmaceutical compound
SN-011 is an experimental drug which acts as a potent antagonist of the stimulator of interferon genes (STING) protein. It binds with higher affinity to
SN-011
"SN2002dd in the HDF North - 2002". www.esahubble.org. Retrieved 2024-08-17. "SN 2004am | Transient Name Server". www.wis-tns.org. Retrieved 14 July 2020.
List_of_supernovae
Galaxy in the constellation Draco
observed in NGC 6373: SN 2001ad (Type II, mag. 17.4) was discovered by the Beijing Astronomical Observatory (BAO) on 11 March 2001. SN 2012an (Type IIb, mag
NGC_6373
Solutions of Lamé's equation
above) d 2 y d x 2 + ( Λ − κ 2 sn 2 x − Ω 2 k 4 sn 4 x ) y = 0 , {\displaystyle {\frac {d^{2}y}{dx^{2}}}+(\Lambda -\kappa ^{2}\operatorname {sn} ^{2}x-\Omega
Lamé_function
Supernova in the constellation Eridanus
SN 2007on was a Type Ia supernova that occurred in the elliptical galaxy NGC 1404, a member of the Fornax Cluster, in November 2007. It is classified as
SN_2007on
Pollard M, Li-Beisson Y, Beisson F, Feig M, Ohlrogge J (June 2010). "A distinct type of glycerol-3-phosphate acyltransferase with sn-2 preference and phosphatase
Glycerol-3-phosphate 2-O-acyltransferase
Glycerol-3-phosphate_2-O-acyltransferase
Pair of colliding spiral galaxies in the constellation Canis Major
ISSN 0081-0304. "SN 1999ec". Transient Name Server. IAU. Retrieved 29 December 2024. Graham, J.; Li, W.; Puckett, T.; Toth, D.; Qiu, Y. L. (2003). "Supernovae
NGC_2207_and_IC_2163
Supernova that has been lensed
iPTF16geu, SN Requiem (SN 2016jka), SN Zwicky (SN 2022qmx), Chen et al. SN, SN H0pe, SN 2022riv, and SN Winny (SN 2025wny). Besides SN Refsdal, SN H0pe has
SN_Refsdal
Correlation coefficient used when one variable is dichotomous
where there is a function available for calculating sn−1, but no function available for calculating sn. Also the square of the point biserial correlation
Point-biserial correlation coefficient
Point-biserial_correlation_coefficient
Invariant of polynomial roots
index m inside Sn, then its orbit under Sn has order m. Let P1, ..., Pm be the elements of this orbit. Then the polynomial R G = ∏ i = 1 m ( Y − P i ) {\displaystyle
Resolvent_(Galois_theory)
Pair of galaxies in the constellation Ursa Major
Bibcode:1998IAUC.6830....1L. "SN 1998T". Transient Name Server. IAU. Retrieved 21 February 2026. Qiu, Y. L.; Qiao, Q. Y.; Hu, J. Y.; Li, W.-D. (1999). "Supernova
Arp_299
Method for numerical solution of certain systems of equations
cs_k, sn_k] = apply_givens_rotation(h, cs, sn, k) % apply for ith column for i = 1:k-1 temp = cs(i) * h(i) + sn(i) * h(i + 1); h(i+1) = -sn(i) * h(i)
Generalized minimal residual method
Generalized_minimal_residual_method
Chemical compound known as stannic oxide, cassiterite and tin ore
as stannic oxide, is the inorganic compound with the formula SnO2. The mineral form of SnO2 is called cassiterite, and this is the main ore of tin. With
Tin(IV)_oxide
Lithography using 13.5 nm UV light
that uses 13.5 nm extreme ultraviolet (EUV) light from a laser-pulsed tin (Sn) plasma to create intricate patterns on semiconductor substrates. As of 2025[update]
EUV_lithography
Supernova
SN 2008D was a supernova detected with NASA's Swift X-ray telescope. The explosion of the supernova precursor star, in the spiral galaxy NGC 2770 (88 million
SN_2008D
2005 supernova event in constellation Canes Venatici
SN 2005cs was a supernova in the spiral galaxy M51, known as the Whirlpool Galaxy. It was a Type II-P core-collapse supernova, discovered June 28, 2005
SN_2005cs
Lists of values of mathematical functions
table of N approximations sn for sin(2πn/N) and cn for cos(2πn/N) is: s0 = 0 c0 = 1 sn+1 = sn + d × cn cn+1 = cn − d × sn for n = 0,...,N − 1, where
Trigonometric_table
Chemical compound
Tin(II) 2-ethylhexanoate or tin(II) octoate or stannous octoate (Sn(Oct)2) is the octoate or 2-ethylhexanoate salt of tin. Produced by the reaction of
Tin(II)_2-ethylhexanoate
Chemical compound
SnII and SnIV and no Sn–Sn bonds). The monoclinic form contains tetramers, Sn4F8, where there are two distinct coordination environments for the Sn atoms
Tin(II)_fluoride
Galaxy in the constellation Eridanus
Retrieved 1 December 2024. "SN 1963P". Transient Name Server. IAU. Retrieved 17 August 2024. Nakano, S.; Aoki, M.; Kushida, Y.; Kushida, R.; Benetti, S
NGC_1084
Algorithmic process of solving equations
x , y ) σ = f ( a , y ) {\displaystyle f(x,y)\sigma =f(a,y)} is not an instance of f ( x , y ) τ = f ( y , y ) {\displaystyle f(x,y)\tau =f(y,y)} . A
Unification (computer science)
Unification_(computer_science)
Supernova on February 4, 2006
SN 2006X was a Type Ia supernova about 65 million light-years away in Messier 100, a spiral galaxy in the constellation Coma Berenices. The supernova was
SN_2006X
Quantifier elimination for semi-algebraic sets
subsets Sn of Rn for each n ≥ 1 such that we can take finite unions and complements of the subsets in Sn and the result will still be in Sn, moreover
Tarski–Seidenberg_theorem
Possible supernova event located in Centaurus-Circinus
SN 185 (also known as RCW 86) was a transient astronomical event observed in the year AD 185, likely a supernova. The transient occurred in the direction
SN_185
Spiral Galaxy in the constellation Perseus
have been observed in NGC 105: SN 1997cw (Type Ia, mag. 16.5) was discovered by the BAO Supernova Survey on 10 July 1997. SN 2007A (Type Ia, mag. 16) was
NGC_105
2005 supernova in the galaxy NGC 266
SN 2005gl was a supernova in the barred-spiral galaxy NGC 266. It was discovered using CCD frames taken October 5, 2005, from the 60 cm automated telescope
SN_2005gl
Chemical compound
SN 35210 is an arylcyclohexylamine dissociative anesthetic drug. It was derived from ketamine with the intention of producing a shorter acting agent more
SN_35210
Chemical compound, stannous oxide (SnO)
disproportionation occurs giving Sn metal and Sn3O4 which further reacts to give SnO2 and Sn metal. 4SnO → Sn3O4 + Sn Sn3O4 → 2SnO2 + Sn SnO is amphoteric, dissolving
Tin(II)_oxide
Galaxy in the constellation Ursa Major
have been observed in NGC 3184: SN 1921B (type unknown, mag. 13.5) was discovered by Fritz Zwicky on 6 April 1921. SN 1921C (type unknown, mag. 11) was
NGC_3184
any point. Contents: 0–9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z See also 21st Century Schizoid Band: Band of former King Crimson members
List of progressive rock artists
List_of_progressive_rock_artists
Chemical compound
also known as stannous selenide, is an inorganic compound with the formula SnSe. Tin(II) selenide is a narrow band-gap (IV-VI) semiconductor structurally
Tin_selenide
Protein-coding gene in the species Homo sapiens
snRNP70 also known as U1 small nuclear ribonucleoprotein 70 kDa is a protein that in humans is encoded by the SNRNP70 gene. snRNP70 is a small nuclear
SnRNP70
Chemical compound
compound with the chemical formula is SnS. A black or brown solid, it occurs as the rare mineral herzenbergite (α-SnS).It is insoluble in water but dissolves
Tin(II)_sulfide
Class of enzymes
1-alkyl-2-acetyl-sn-glycero-3-phosphocholine + 1-organyl-2-lyso-sn-glycero-3-phospholipid ⇌ {\displaystyle \rightleftharpoons } 1-organyl-2-lyso-sn-glycero-3-phosphocholine
Platelet-activating factor acetyltransferase
Platelet-activating_factor_acetyltransferase
Spiral galaxy in the constellation Leo
Koshida, Y. (2003). "Supernovae 2003J, 2003K, 2003L, 2003M". International Astronomical Union Circular (8048): 1. Bibcode:2003IAUC.8048....1K. "SN 2003L"
NGC_3506
Class of chemical compounds
on sn-1, ester on sn-2: "ether lipids" in the context of bacteria and eukaryotes refer to this class of lipids. Compared to the usual 1,2-diacyl-sn-glycerol
Ether_lipid
2008 supernova event in constellation Canes Venatici
SN 2008ax was a helium-rich Type Ib core-collapse supernova in the interacting galaxy NGC 4490. It was independently discovered on 3 March 2008 by LOSS
SN_2008ax
This is a partial list of music genres and styles, covering entries from the letters S to Z. For the other sections, see Section A–F, Section G–M and Section
List_of_styles_of_music:_S–Z
Chemical compound
also known as stannic iodide, is the chemical compound with the formula SnI4. This tetrahedral molecule crystallizes as a bright orange solid that dissolves
Tin(IV)_iodide
Family of solutions to related differential equations
2 d 2 y d x 2 + x d y d x + ( x 2 − α 2 ) y = 0 , {\displaystyle x^{2}{\frac {d^{2}y}{dx^{2}}}+x{\frac {dy}{dx}}+\left(x^{2}-\alpha ^{2}\right)y=0,} where
Bessel_function
Chemical compound
In the gas phase SnBr2 is non-linear with a bent configuration similar to SnCl2 in the gas phase. The Br-Sn-Br angle is 95° and the Sn-Br bond length is
Tin(II)_bromide
Enzyme
3-bis-O-(geranylgeranyl)-sn-glycerol This enzyme catalyses one of the steps in the biosynthesis of polar lipids in Archaea. Morii H, Nishihara M, Koga Y (November 2000)
CDP-archaeol_synthase
Supernova in the constellation Leo
SN 1988Z was a prototypical Type IIn supernova event in the equatorial constellation of Leo. The apparent host is an irregular galaxy with the designation
SN_1988Z
Face-on spiral galaxy in the constellation Pisces
; Hirose, Y.; Kushida, R.; Kushida, Y.; Li, W. (2002). "Supernova 2002ap in M74". IAU Circular. 7810: 1. Bibcode:2002IAUC.7810....1N. "SN 2002ap". Transient
Messier_74
Class of enzymes
In enzymology, sn-glycerol-1-phosphate dehydrogenase (EC 1.1.1.261) is an enzyme that catalyzes the chemical reaction (S)-glyceryl 1-phosphate + NAD+
Sn-glycerol-1-phosphate dehydrogenase
Sn-glycerol-1-phosphate_dehydrogenase
Sequence in probability theory
construction, this implies that if Y t {\displaystyle Y_{t}} is a martingale, then X t = Y t − Y t − 1 {\displaystyle X_{t}=Y_{t}-Y_{t-1}} will be an MDS—hence
Martingale difference sequence
Martingale_difference_sequence
to use the usual "round" or "arclength" metric ρn on Sn; that is, for points x and y in Sn, ρn(x, y) is defined to be the (Euclidean) angle that they subtend
Spherical_measure
Class of enzymes
chemical reaction acyl-CoA + 1-acyl-sn-glycero-3-phosphocholine ⇌ {\displaystyle \rightleftharpoons } CoA + 1,2-diacyl-sn-glycero-3-phosphocholine Thus, the
1-acylglycerophosphocholine O-acyltransferase
1-acylglycerophosphocholine_O-acyltransferase
Property in group theory
Sn represented by even-length words "even", and the elements represented by odd-length words "odd". Proof 4 Recall that a pair x, y such that x < y and
Parity_of_a_permutation
February 2025. Retrieved 24 June 2025. "Données de population". www.ansd.sn. ANSD. Retrieved 4 August 2026. "As of January 1st 2025, the usually resident
List of countries and dependencies by population
List_of_countries_and_dependencies_by_population
Galaxy in the constellation Hercules
Kushida, Y.; Kushida, R. (1998). "Supernova 1998V in NGC 6627". International Astronomical Union Circular (6841): 1. Bibcode:1998IAUC.6841....1H. "SN 1998V"
NGC_6627
Compound Poisson-family discrete probability distribution
random variable, Y = S N = X 1 + X 2 + . . . + X N {\displaystyle Y=SN=X_{1}+X_{2}+...+X_{N}} The p.g.f. of the distribution of SN is : E [ z S N ] =
Neyman_Type_A_distribution
Elliptical galaxy in the constellation Virgo
supernovae have been observed in M49: SN 1969Q (type unknown, mag. 13) was discovered by Evans on 12 June 1969. SN 2024kce (Type Ia-pec, mag. 17.5477) was
Messier_49
Smooth manifold that is homeomorphic but not diffeomorphic to a sphere
+ [y] = [x + y], where x and y are arbitrary representatives of their equivalence classes, and x + y denotes the smooth structure on the smooth Sn that
Exotic_sphere
Indian theoretical physicist (1894–1974)
Prize. In his book The Scientific Edge, physicist Jayant Narlikar observed: SN Bose's work on particle statistics (c. 1922), which clarified the behaviour
Satyendra_Nath_Bose
Concept in topology
→Y induces a homomorphism f∗ from Hm(X) to Hm(Y). Let [X], resp. [Y] be the chosen generator of Hm(X), resp. Hm(Y) (or the fundamental class of X, Y)
Degree of a continuous mapping
Degree_of_a_continuous_mapping
Four-letter code designation for aviation facilities around the world
been officially reserved by ICAO. A B C D E F G H J K L M N O P R S T U V W Y Z Airspace class Geocode IATA airport code ICAO airline designators – a list
ICAO_airport_code
Tabular arrangement of the chemical elements
; Abdullin, F.Sh.; Bailey, P.D.; Benker, D.E.; Bennett, M.E.; Dmitriev, S.N.; et al. (2010). "Synthesis of a new element with atomic number Z = 117"
Periodic_table
Chemical compound
the molecules of [SnCl4(H2O)2] through hydrogen bonds. A pentahydrate has also been crystallized. In cis-SnCl4(H2O)2·3H2O, the Sn-Cl bonds are 238.3 pm
Tin(IV)_chloride
Galaxy in the constellation Leo
Bibcode:1989IAUC.4726....1E. "SN 1989B". Transient Name Server. IAU. Retrieved 3 December 2024. Treffers, R. R.; Peng, C. Y.; Filippenko, A. V.; Richmond
Messier_66
Galaxy in the constellation Ursa Major
starburst galaxies to Earth, M82 is the prototypical example of this galaxy type. SN 2014J, a Type Ia supernova, was discovered in the galaxy on 21 January 2014
Messier_82
Chemical compound
pure Sn(OH)2 is not known. Sn(OH)2 has been claimed to arise from the reaction of (CH3)3SnOH with SnCl2 in an aprotic solvent: 2 Me3SnOH + SnCl2 → Sn(OH)2
Tin(II)_hydroxide
Supernova event of June 2018 in the constellation Hercules
SN 2018cow (ATLAS name: ATLAS18qqn; also known as Supernova 2018cow, AT 2018cow (AT = Astronomical Transient), and "The Cow") was a very powerful astronomical
SN_2018cow
German airborne radar in World War II
FuG 212 Lichtenstein C-1, FuG 220 Lichtenstein SN-2 and the very rarely used FuG 228 Lichtenstein SN-3. (FuG is short for Funk-Gerät, radio set). The
Lichtenstein_radar
(4 April 2022). "Unveiling the Nature of SN 2011fh: A Young and Massive Star Gives Rise to a Luminous SN 2009ip-like Event". The Astrophysical Journal
List_of_largest_stars
(founder) Wilcox, Pennsylvania – A.I. Wilcox Wilcox Township, Michigan – S.N. Wilcox Wildomar, California – Wil – William Collier, Do – Donald Graham
List of places in the United States named after people
List_of_places_in_the_United_States_named_after_people
Special function defined by an integral
) − K ( 1 2 ) ] = ∫ 0 1 1 y 2 ( y 2 + 1 ) artanh ( y 2 ) d y = [ 2 arctan ( y ) − 1 y ( 1 − y 2 ) artanh ( y 2 ) ] y = 0 y = 1 = 2 arctan ( 1 ) = π
Elliptic_integral
Chemical compound
Tin telluride is a compound of tin and tellurium (SnTe); is a IV-VI narrow band gap semiconductor and has direct band gap of 0.18 eV. It is often alloyed
Tin_telluride
Chemical compound
sn-Glycerol 1-phosphate is the conjugate base of a phosphoric ester of glycerol. It is a component of ether lipids, which are common for archaea. Glycerol
Glycerol_1-phosphate
Supernova event from 1994 in constellation Canes Venatici
SN 1994I is a Type Ic supernova discovered on April 2, 1994 in the Whirlpool Galaxy by amateur astronomers Tim Puckett and Jerry Armstrong of the Atlanta
SN_1994I
Chemical compound
Tin(II) sulfate (SnSO4) is a chemical compound. It is a white solid that can absorb enough moisture from the air to become fully dissolved, forming an
Tin(II)_sulfate
Chemical compound
Tin(II) acetate is the acetate salt of tin(II), with the chemical formula of Sn(CH3COO)2. It was first discovered in 1822. To obtain tin(II) acetate, tin(II)
Tin(II)_acetate
National airline of Belgium (1923–2001)
to 2001, with its hub at Brussels Airport. After its bankruptcy in 2001, SN Brussels Airlines was formed through a takeover of former subsidiary Delta
Sabena
Chemical compound
amounts of both elements at 580 °C: 4 Sn + 3 P4 → 4 SnP3 SnP3 has been evaluated for use in energy storage devices. SnP, which has the sodium chloride structure
Tin_triphosphide
Galaxy in the constellation Triangulum
SN 2016hkn (Type II, mag. 17.2) was discovered by Paolo Campaner on October 22, 2016. It was located at RA 02h 08m 34.23s, DEC +29° 14′ 11.1″. SN 2020mbe
NGC_819
Chemical compound
Tin(IV) sulfide is a compound with the formula SnS2. A brown, water-insoluble solid, it is a semiconductor with band gap 2.2 eV. It occurs naturally as
Tin(IV)_sulfide
Chemical compound
chemical compound SnBr4. It is a colourless low melting solid. SnBr4 crystallises in a monoclinic crystal system with molecular SnBr4 units that have
Tin(IV)_bromide
RNA family
site for Sm protein. Sm protein is a shared component of spliceosomal snRNPs. SmY RNAs have been found in nematodes of class Chromadorea, which includes
SmY_RNA
Matrix representing a Euclidean rotation
x Y x x + Q x y Y x y Q x y − M x y + Q x x Y x y + Q x y Y y y Q y x − M y x + Q y x Y x x + Q y y Y x y Q y y − M y y + Q y x Y x y + Q y y Y y y ]
Rotation_matrix
Country in Southwestern Europe
Terceira and Flores Islands (Azores, Portugal) hydrologic services" (PDF). SN Applied Sciences. 4 (6) 184. Cham: Springer International Publishing. doi:10
Portugal
Galaxy in the constellation Ursa Major
lines of weakly ionized atoms. One supernova has been observed in NGC 4172: SN 2006az (Type Ia, mag. 17.1) was discovered by Jack B. Newton, L. Cox, and
NGC_4172
Galaxy in the constellation Pisces
observed in NGC 7541: SN 1998dh (Type Ia, mag. 16.8) was discovered by the Lick Observatory Supernova Search (LOSS) on 20 July 1998. SN 2017jmk (Type II,
NGC_7541
Variable star in the constellation Cepheus
2025-03-19. "ASAS-SN Variable Stars Database". ASAS-SN Variable Stars Database. ASAS-SN. Retrieved 16 December 2024. Yamashita, Y. (1975). "The C-classification
S_Cephei
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