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33066
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location Moscow, Russia
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visits member for 4 years, 1 month
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umagon at google mail


Jul
22
reviewed No Action Needed How did Le Verrier calculate Neptune's position?
Jul
22
reviewed Leave Open Explicit expression for homeomorphism and homotopy equivalence
Jul
22
reviewed No Action Needed Does the boundaries of non-disjoint sets in Euclidean space have common element?
Jul
22
reviewed Leave Closed How to find laplace transform of (t.sint.e^t)
Jul
21
reviewed Reviewed find a formula for $\sin3 \theta$ in terms of $\sin \theta$,$\cos \theta$ by using an angle-sum formula for sin(2θ+θ)
Jul
21
reviewed Leave Closed Write the given expression as an algebraic expression in $x$. $\cos (2{\tan ^{ - 1}}x)$
Jul
21
reviewed Close the number of cube roots in a finite field
Jul
21
awarded  Yearling
Jul
20
revised Is at least one of $6k + 1$ or $6k-1$ prime?
edited tags
Jul
19
reviewed Close Frenet-Serret formula proof
Jul
19
reviewed Close Differential equations,x[t] is periodic
Jul
18
awarded  Proofreader
Jul
18
reviewed Reject suggested edit on Prove that the convex hull of a set is the smallest convex set containing that set
Jul
18
revised Eilenberg-Maclane space $K(G\rtimes H, 1)$ for a semi-direct product.
edited tags
Jul
18
comment Intuition for the definition of the Gamma function?
(Somewhat) related: How to come up with the gamma function? & Understanding the Gamma function
Jul
17
reviewed Leave Open Ordered field with nested intervals axiom without Archimedean axiom
Jul
17
revised What does the colon use in the decimal place mean?
edited tags
Jul
17
reviewed Leave Closed Which mathematical ideas most influenced the way you think?
Jul
17
reviewed Leave Closed Is there a formula for Merten's function $M(x)=\sum_{n\leq x}\mu (n)$?
Jul
17
reviewed Close Permutation problem - How many permutations are there such that no two numbers are immediately adjecent?