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50m
reviewed Approve suggested edit on How to factor $x + 1 - 2 \sqrt x$?
58m
reviewed Approve suggested edit on Prove $\sin^2\theta + \cos^2\theta = 1$
59m
reviewed No Action Needed Count the number of intervals that fall in the given range
59m
reviewed Reopen How to find maximum of an inverse of a matrix?
1h
revised Prove that $A^{10}$ is equal to linear combination of $A^k, k = 1,…,9$ and identity matrix.
added 1 character in body
2h
comment Prove that $A^{10}$ is equal to linear combination of $A^k, k = 1,…,9$ and identity matrix.
Use this theorem.
2h
reviewed Looks OK Differentiating both sides of an equality with respect to first variables? (Not answered)
2h
reviewed Edit Does the functor that preserves limit always have a left adjoint?
2h
revised Does the functor that preserves limit always have a left adjoint?
edited body
2h
reviewed Reopen Is abstract algebra (mostly?) restricted to $2$-ary operators?
2h
reviewed Leave Closed probability tennis games, player winning all games
3h
reviewed Close The scale for a planet diameter is 1:40000000. The planet's diameter is 12,756.32km. What is the diameter of the model in cm?
3h
reviewed Leave Open Prove there do not exist natural numbers m and n such that $7m^2 = n^2$.
3h
reviewed Close Logical Statistics Probability
3h
reviewed Close Two integral involving logarithm and trigonometric function
3h
reviewed Close Find the coordinates of a vector (7,14,-1,2) in the basis (1,2,-1,-2), (2,3,0,-1), (1,2,1,4) and (1,3,-1,0)
3h
reviewed Close how to do Diffie-Hellman-Merkle Key Exchange
3h
reviewed Leave Open Is it true that $\lim \inf (x_n - y_n ) = \lim \inf (x_n ) + \lim \inf ( - y_n )$ if $(x_n)$ is convergent?
3h
reviewed Leave Open determining reflective, symmetric, transitive, anti-symmetric properties and describing equivalence classes
3h
reviewed Reopen Growth of $\sum_{x=1}^{n-1} \left\lceil n-\sqrt{n^{2}-x^{2} } \right\rceil$