Math 2.0

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This copy of the site has no build data, so the lists give no evidence levels.

3070 statements with no proof; 222 open conjectures and problems. Showing up to 1–150 in each list.

Statements with no proof

No proof node in the graph proves these statements. A source can still support them.

NameTagKindEvidence
The integers are a Euclidean domain000JFQGDXGstatementnone
Sequential characterization of limits000MXHEY22statementnone
Singular value decomposition000NPTMX6Jstatementnone
Power series are differentiable inside the radius of convergence002X7EK91Hstatementnone
A function with zero derivative is constant003QDZ4T16statementnone
Closure is the set of limits of sequences003QP7A8HGstatementnone
A differentiable function is convex iff its derivative is increasing005JT76HCKstatementnone
Taylor's theorem with the Cauchy remainder005Q84BMADstatementnone
The characteristic of an integral domain is zero or prime00758QM6JJstatementnone
Dimension of the dual space00889YD15Kstatementnone
Scaling a row scales the determinant009CY8JXFXstatementnone
Stars and bars009TEMTQKHstatementnone
Picard–Lindelöf theorem in integral form00BT70ND50statementnone
Finite intersection property00BWV5CKCFstatementnone
Addition formula for Fibonacci numbers00CN2F997Qstatementnone
The logarithm grows slower than any power00DGYY10FVstatementnone
Laws of exponents in a group00DRK90Z6Kstatementnone
−1 is a square modulo p if and only if p is not 3 modulo 400DW862T78statementnone
Congruence is compatible with addition00FWBN7F0Ystatementnone
Intermediate value theorem00KAFBR32Estatementnone
Modulus of the conjugate00KRCVE7CKstatementnone
Every vector space has a basis00MS9VMQ9Zstatementnone
Change of variables in multiple integrals00N5FHP1CVstatementnone
Derivative of sine00R4MWW532statementnone
Divergence of the sum of the reciprocals of the primes00RA98X2CPstatementnone
Ramsey's theorem00TQV3F5S4statementnone
A finite group is nilpotent iff it is the product of its Sylow subgroups00Y9N80VSSstatementnone
Volume of a ball in R^n00YH28R457statementnone
Additivity of line integrals under concatenation00ZEBSMNNVstatementnone
Uniqueness of finite fields of a given order010PKCQPXPstatementnone
Hensel's lemma010QVB71T2statementnone
Recurrence for Bell numbers0110GBHPPBstatementnone
A convex function on an open interval is continuous011HV2GAWFstatementnone
Jordan–Chevalley decomposition011K11VPJNstatementnone
1 + x is at most exp x012C7GFF20statementnone
exp z = 1 iff z is an integer multiple of 2πi013AHC4DRTstatementnone
Existence of splitting fields01441KDGBYstatementnone
Chernoff bound014PEBGDYFstatementnone
Cayley's theorem0151VYVX27statementnone
Integral equation form of an initial value problem015KK993C5statementnone
Leibniz formula for determinants016PE4VZ8Qstatementnone
Riemann's criterion for integrability017DH8WXTEstatementnone
Dyck words are counted by Catalan numbers017SRZ7NE9statementnone
Rolle's theorem0194DY35BGstatementnone
Residue at a simple pole01991NCP7Hstatementnone
Derivative of the complex exponential019H1Z6419statementnone
Integral test019QZ6RRVHstatementnone
First derivative test01A2EGXJEMstatementnone
cos pi = -101A8JGR4JMstatementnone
Distance from a point to a line01AAYNSBN6statementnone
Chapman–Kolmogorov equation01APZ8GDQHstatementnone
Well-ordering principle01BX15HSRRstatementnone
The complex numbers cannot be ordered01CJRJKDAAstatementnone
Normality via left and right cosets01E7SWYJX3statementnone
Determinant of a scalar multiple01EXSMK864statementnone
Extensions of solvable groups are solvable01EY0EM7RPstatementnone
Urysohn's lemma01EY3VR7ZDstatementnone
Composition of injections is injective01FPXMTBX1statementnone
Equivalence classes form a partition01HT2CH8BHstatementnone
Vandermonde's identity01JADB9VW5statementnone
Triangle inequality for a metric01M6CW9VM6statementnone
Cauchy's integral theorem01MPZXYVYFstatementnone
sin x / x tends to 101QSSKS5C1statementnone
Sum of the first n natural numbers01QZNHQWYDstatementnone
A graph is bipartite iff it has no odd cycle01R1HPEK6Sstatementnone
Symmetry of second derivatives01V9FPBBVKstatementnone
Bijective iff it has a two-sided inverse01VG2A0BHWstatementnone
Uniqueness of the algebraic closure01VQ7C4FTBstatementnone
Cantor set is closed01VT24J1SDstatementnone
Arguments add under multiplication01W6RKJP01statementnone
Legendre's formula01WPV9PHN7statementnone
Cassini's identity01WQZK97Z5statementnone
Adding a multiple of one row to another preserves the determinant01ZTQBK64Qstatementnone
Law of the unconscious statistician01ZWX875ATstatementnone
Carathéodory's theorem0201Q4P2B5statementnone
Euler's theorem on Eulerian circuits020422MDQFstatementnone
Existence of prime factorization020K0X7HVRstatementnone
Darboux and Riemann integrals agree021XJAQVDCstatementnone
Uniqueness of solutions for Lipschitz vector fields025PKW8AMRstatementnone
A function with nonnegative derivative is increasing026BJBQNGJstatementnone
Uniformly continuous functions map Cauchy sequences to Cauchy sequences026FDZFRXSstatementnone
Parallelogram law026HPGYGS4statementnone
Quotients of solvable groups are solvable027ZQS04SJstatementnone
Angle addition formulas028XEQCE88statementnone
Euclid's theorem0292EPPPT0statementnone
Holomorphic functions on a disc have primitives02AC7JR6G6statementnone
Eisenstein's criterion02BPKD7TMDstatementnone
Mean value inequality02CYB184RCstatementnone
Open balls form a basis of the metric topology02EEX96DFSstatementnone
Rank of a product of matrices02FDWY55ASstatementnone
Casorati–Weierstrass theorem02HHNPC8EDstatementnone
Existence of maximal ideals02HJYT53F7statementnone
Chebyshev's inequality02HZ1BK3MWstatementnone
Isometries are injective02J4G4J4TJstatementnone
Characteristic function of a sum of independent random variables02JGYG0T7Mstatementnone
Power series of sine02KTRHQMHNstatementnone
The complex exponential is 2πi-periodic02P2PYH3X3statementnone
Sum of the roots of unity02PETK9PQ4statementnone
Cauchy mean value theorem02SYZAWM2Kstatementnone
Closure is closed02TZDKG50Qstatementnone
Decreasing sequence bounded below converges02V2GYAC8Pstatementnone
Riemann mapping theorem02WHMEG5ZRstatementnone
K5 and K3,3 are not planar030A3FHN14statementnone
The real part of a holomorphic function is harmonic031BG625Y3statementnone
A tangent is perpendicular to the radius031JV5S54Dstatementnone
Order of a cyclic subgroup equals the order of its generator031M8HX7DAstatementnone
Residue theorem032HKYS329statementnone
Factorial formula for binomial coefficients033KTKKRV6statementnone
Formula for the modulus034FGCEYX4statementnone
Triangularisation0363JMQ42Ystatementnone
Gauss's lemma on quadratic residues037ACYXB5Zstatementnone
Leibniz formula for pi037FD5NBRTstatementnone
Arzelà–Ascoli theorem0381S8Z5P0statementnone
Freshman's dream0396VGFA78statementnone
Taylor's theorem with the Peano remainder03AJHX431Astatementnone
Generalized Euclid's lemma03BAREW1Z5statementnone
Law of total variance03BY5XTNA4statementnone
Variance of the normal distribution03EESZDB9Astatementnone
Vector triple product03FTB26QYDstatementnone
Chain rule for Jacobian matrices03GGQEAG9Sstatementnone
Pythagorean trigonometric identity03H7WZ4T3Kstatementnone
Triangle inequality03HF5PMY5Tstatementnone
Mean value theorem in several variables03HGK7EW6Rstatementnone
Wilson's theorem03KGGKTB2Estatementnone
Equivalence of norms in finite dimension03MC70ZRNRstatementnone
de Moivre's formula03MTBVG3VEstatementnone
Vectors are perpendicular if and only if their dot product is zero03NK6RSRQ1statementnone
Cauchy–Schwarz inequality for expectations03PGHKAJG3statementnone
A matrix is invertible iff its determinant is a unit03Q7RE2HXRstatementnone
Complement principle03QC59M99Bstatementnone
Taylor's theorem03QHBVW4TTstatementnone
Formula for the number of derangements03RSJXF728statementnone
Limit of a quotient of sequences03S6GWWKEZstatementnone
Sum of a finite geometric progression03X8V7D64Mstatementnone
Open mapping theorem03YEM7JEDNstatementnone
C^1 vector fields satisfy the Picard–Lindelöf hypotheses03Z9V0Y78Astatementnone
Binet's formula0404D8TN7Ystatementnone
Lebesgue number lemma040CFNJEAPstatementnone
Subgroups of a finite cyclic group correspond to divisors of its order0423TXR9ANstatementnone
Rational canonical form042JWAR3Q0statementnone
Continuous bijection from a compact space to a Hausdorff space is a homeomorphism0430ETCMKDstatementnone
Uniform limits of holomorphic functions are holomorphic0431RN0R1Nstatementnone
Fermat's theorem on sums of two squares043B3ENSTYstatementnone
The derangement numbers count derangements045ENVCCZVstatementnone
Monotonicity of probability0464Z0JP2Estatementnone
Every real number has a decimal expansion047KEVEZ9Qstatementnone
Parseval's identity047RFCNVSKstatementnone
Maximum modulus principle048F2P90WRstatementnone
Lagrange multiplier with one constraint04A2XEX4D4statementnone
Exponential of a sum of commuting matrices04BD23PSK5statementnone

Open conjectures and problems

No node in the graph resolves these conjectures and problems.

NameTagKindEvidence
Trisecting the angle00J3DCCEK5problemnone
Doubling the cube04SD3F4FCRproblemnone
Goldbach's conjecture063JNBSMJ0conjecturenone
Buffon's needle problem06X5PF6YFPproblemnone
Squaring the circle0BSXRER81Bproblemnone
Twin prime conjecture0FER36N8SBconjecturenone
Coupon collector's problem0MXCP7MXWJproblemnone
Monty Hall problem0PBWWQD9KYproblemnone
Gambler's ruin0WFMKK7DFZproblemnone
Sendov's conjecture101H2VSX2Rconjecturenone
Hilbert's twentieth problem187NP5Z002problemnone
Park's conjecture1D541B576Sconjecturenone
Mayer and Lagrange problems1J8TYT7C49problemnone
Non-negative least squares1JV7093B4Cproblemnone
Post's problem1RVF7DWG8Cproblemnone
Kirkman's schoolgirl problem1SYQ6QY95Yproblemnone
Hochster's homological conjectures1TNS604ZSTconjecturenone
Kobayashi conjecture1X3EV2TZNNconjecturenone
Gelfand's problem on the index25G4AP9P4Rproblemnone
Gauss circle problem26XTJJT267problemnone
Homotopy hypothesis2E83D9ACDYconjecturenone
Hadwiger conjecture35NNSXJB1Kconjecturenone
Stefan problem3B0HB3DHW1problemnone
Thomson problem3C7V5X5FY8problemnone
Uniform boundedness conjecture for preperiodic points3T9TT5SSGDconjecturenone
Ten martini problem3X4ZQ41PXGproblemnone
Union-closed sets conjecture4628Z96WVZconjecturenone
Navier–Stokes existence and smoothness46Z1TVS2K6conjecturenone
Levi problem47CVS9RJ9Dproblemnone
Conjugacy problem4AF7AF7690problemnone
Erdős distinct distances problem4H31EM5T0Cproblemnone
First Cousin problem537J79VYQRproblemnone
Brauer's height zero conjecture5M0HYY3RYVconjecturenone
Matrix Riemann–Hilbert problem5NH9BXWAKRproblemnone
Invariant subspace problem5RF055GK4Nproblemnone
Neumann problem61VG0XSDM6problemnone
n-body problem62SNWC5E45problemnone
Yamabe problem63ZT8D3DXDproblemnone
Schanuel's conjecture65PV4VFP9Yconjecturenone
Isoperimetric problem of the calculus of variations6FY0KHMK5Aproblemnone
Collatz conjecture6PCQEXEX4Nconjecturenone
Variational inequality6QS7X5GVMYproblemnone
Dynamical Mordell–Lang conjecture6TV7FR553Hconjecturenone
Hadamard conjecture6X9S10E3M2conjecturenone
Serre's problem on projective modules7GG0XYHB0Tproblemnone
Hilbert's twenty-first problem7RHW0KA5RYproblemnone
Waring's problem7VWGA444K3problemnone
Topology optimization7YHW7PHH6Hproblemnone
Word problem for an algebra7ZKBV18BFGproblemnone
Hilbert's third problem81035XQ5HEproblemnone
Hauptvermutung811NW2WEJHproblemnone
Dirichlet problem8D56GQ4AG8problemnone
Catenary problem8REBFQD6E0problemnone
Bolza problem8Z55NXZWD5problemnone
11/8 conjecture90RA6TAT7Hconjecturenone
Gauss variational problem94GSMEWPTNproblemnone
Restriction conjecture9CE11G48JYconjecturenone
Tammes problem9WD2TZ4ZB5problemnone
Tautochrone problemA56P5S5D6Zproblemnone
Tarski's finite basis problemAB22FWBQ0Mproblemnone
Green–Griffiths–Lang conjectureAD9GD9EM9Rconjecturenone
Minimal surface of revolutionAEG6QWEFRGproblemnone
Word problem for free algebras of a varietyAR14VMVHNGproblemnone
1/3–2/3 conjectureAXCH7Z9FKHconjecturenone
Kurosh problemB1Q5F5VNSKproblemnone
Jacobian conjectureB5JFXEQQD8conjecturenone
Homological mirror symmetryB5N9WJH5F0conjecturenone
Selberg's 1/4 conjectureB7K7NY8NTJconjecturenone
Artin's conjecture on primitive rootsBB4FJ1FFGMconjecturenone
Jacobson's conjectureBFP0ZST7V3conjecturenone
Hilbert's sixteenth problemC1XNMMKZ1Jproblemnone
Schottky problemC210P5AK7Xproblemnone
Kadison–Singer problemC8TTRMVVS7problemnone
Euler's elasticaCBT8F8S8JTproblemnone
Ulam's stability problemCBYB39FTFGproblemnone
Brennan conjectureCH73TVRT27conjecturenone
Moment problemCS7TWHY7JMproblemnone
Kelvin problemCVTKSCP55Aproblemnone
Inverse spectral problemCVYHG5HKPPproblemnone
Suslin's problemD1T39KHPDNproblemnone
Second Cousin problemD44KAF8PNKproblemnone
Standard conjectures on algebraic cyclesD8GA2R3QT5conjecturenone
Rota's basis conjectureD8ZD10YF3Yconjecturenone
Hopf conjectureD95SQEJJSKconjecturenone
Linear-quadratic-Gaussian controlDJB8MAV5BHproblemnone
Generalized Riemann hypothesisDNKA4WBKDSconjecturenone
Hilbert–Smith conjectureDS2AS9TSZPconjecturenone
Kaplansky's conjecturesDSF8C6QPAGconjecturenone
Moser's worm problemDTVFW3QMNWproblemnone
Plateau's problemDVYA6GD8RNproblemnone
Merton's portfolio problemDZKBF576W5problemnone
Kaplansky's zero divisor conjectureE1NE8V7EX8conjecturenone
Fermi–Pasta–Ulam–Tsingou problemEBXRM4PFRCproblemnone
Hilbert–Pólya conjectureECS1GDJ734conjecturenone
Behrens–Fisher problemEJ3W3836VZproblemnone
Unit distance problemEPWB2JEXPEproblemnone
Slice-ribbon conjectureEQB39X4HGBconjecturenone
Voronoi's conjecture on parallelohedraF03A4MKA5Vconjecturenone
Whitehead problemF0B6BRJA5Zproblemnone
Quantum unique ergodicity conjectureF3EB7WZFACconjecturenone
Dixmier conjectureF59TS79V34conjecturenone
Pólya's conjecture on Laplacian eigenvaluesF68QFEYFY0conjecturenone
Problem of ApolloniusF9410EB0N1problemnone
Dido's problemFABJSZ9D3Sproblemnone
Fourier restriction problemFFCH15ZNZGproblemnone
Mahler conjectureFFZHNFJCZSconjecturenone
Erdős conjecture on arithmetic progressionsFN978TDX67conjecturenone
Smale's problems on dynamicsG14BVRT221problemnone
Cycle double cover conjectureG2RYQMGG1Rconjecturenone
abc conjectureG7JH2NXPC0conjecturenone
Hausdorff moment problemG7VG61YD4Jproblemnone
Matrix completionGB7K3PTPARproblemnone
Hadamard's maximal determinant problemGCH1Z9YFNGproblemnone
Riemann problemGJWKX22VVEproblemnone
Goddard problemGQCN7KRSDPproblemnone
Obstacle problemGXN2NEHC8Xproblemnone
Tomographic reconstructionHK1TJFXNG9problemnone
Linear-quadratic regulatorHR720TJZZRproblemnone
Arnold conjectureHY7VRFBAP9conjecturenone
Schiffer's conjectureJ05VKG4XQBconjecturenone
Illumination problemJ1E6BEFAPZproblemnone
Hilbert's seventeenth problemJ45F4F13VBproblemnone
Inscribed square problemJ72DEZHNAWconjecturenone
Langlands programJ9T2M084W5conjecturenone
Three-body problemJE1Z920QKTproblemnone
Triangulation conjectureJNW9GKADDNproblemnone
Zimmer's conjectureJW71J3AKY4conjecturenone
Banach measure problemJXK6NRDH4Vproblemnone
Optimal transport and the Monge problemK8EBASR5VGproblemnone
Zermelo's navigation problemKEXJX0YDT4problemnone
Sidorenko's conjectureKN2PXSCT9Jconjecturenone
Zarankiewicz problemKT9WJFRQ3Fproblemnone
Class number problemKTGAS9DGRXproblemnone
Homicidal chauffeur problemM0B618E2P6problemnone
Pompeiu problemM1KYAQMF9Wproblemnone
Hilbert's fourteenth problemM5N08HD75Vproblemnone
Danzer setMMHWS2TC2Aproblemnone
Group isomorphism problemMP3F49QT3Cproblemnone
Weinstein conjectureMP6B64DS31conjecturenone
Busemann–Petty problemMV58A1F52Eproblemnone
Congruent number problemMWMFQR8SMAproblemnone
Andrews–Curtis conjectureN298DRYE0Wconjecturenone
Lehmer's conjectureNDRRH2YD2Cconjecturenone
Minkowski problemNJP0AZ8R4Kproblemnone
Bernstein's problemNP948D6FR0problemnone
Hilbert's fifth problemNR70GHZ37Dproblemnone
Hilbert's programP1RW6JWX73problemnone
Smooth four-dimensional Poincaré conjectureP70VGYNFS5conjecturenone
Littlewood conjectureP8D6T5A1QDconjecturenone
Word problem for groupsPBGTTAVMMTproblemnone