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10m
reviewed Close math student looking to do better in math competitions.
1d
reviewed Close character theory question
1d
reviewed Close Extend length of the vector
1d
comment What is the combination of Complex, Split-Complex and Dual Numbers
What do you want $ij$, $i\epsilon$, and $j\epsilon$ to be?
2d
reviewed Close Irreducible polynomial and primes
2d
reviewed Leave Open De Moivre's use to a complex number 1
2d
comment Is every sufficiently large positive integer of the form $ab + ac + bc + 1$?
What is the reason for the $+1$? It seems simpler to ask about numbers of the form $ab+ac+bc$, and is clearly equivalent...
2d
reviewed Leave Closed Proving the $\frac{\pi ^2}{8}=\sum_{n=1}^{\infty }\frac{(4n^2-4n+5)}{(4n^2-4n-3)^2}$???
2d
reviewed Close Why $ \mathbb{Z}[x]$ is not Principal Ideal Domain
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reviewed Leave Open Is the simplest form of a quadratic equation factored form or standard form?
2d
reviewed Close Ladybug walking on a hexagon probability question
2d
reviewed Leave Open Finding the function of these numbers $1, 2, 5, 13, 34, 89, 233, 610$
2d
reviewed Leave Open How to find all solutions of the equation $\sin x+\cos x=0$ which belong to $(-\pi, \pi)$?
2d
awarded  Constituent
2d
revised How to find all solutions of the equation $\sin x+\cos x=0$ which belong to $(-\pi, \pi)$?
edited tags
2d
reviewed Close How to solve $4x^2\cos y\sin y\partial{y}-3x\sin y\partial{x}+8\sin^2y\partial{y}=0$?
2d
reviewed Close Put a set of triangles into proper mathematical equations / objects
Dec
19
reviewed Approve Commutativity and norms of specific operators (Problem 2.7.10 in Kreyszig's functional analysis book)
Dec
18
reviewed Leave Open Does a subring of $\mathbb{Z}$ need to be closed under multiplication?
Dec
18
reviewed Close AI Bayes network?