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 Yearling
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1d
reviewed Reject Basic examples topological manifolds with boundary
1d
reviewed Approve Prove that the multiplicative inverse of $a$ modulo $m$ exists if and only if $a$ and $m$ are coprime.
1d
reviewed Approve Complex numbers: conjugate
1d
reviewed Approve solve this linear equation
Aug
1
reviewed Approve Possible values of a $f(x)=(ab-b^2-2)x+\int_{0}^{x} x^2(\cos^{4}t+\sin^{4}t)\mathrm{d}t$
Jul
28
reviewed Approve Choose a random number between 0 and 1 and record its value. Keep doing it until the sum of the numbers exceeds 1. How many tries do we have to do?
Jul
28
reviewed Approve Sign of eigenvalues of $A$ by $\det(A-\lambda I)=\lambda \det(B+D-\lambda I).$
Jul
28
answered Constructing a HoTT proof term of 1≠0
Jul
26
reviewed Approve limit of a region of integration in $\mathbb{R}^2$ approaches a line
Jul
26
reviewed Approve Why is $1^{\infty}$ considered to be an indeterminate form
Jul
23
reviewed Approve Prove that the sum of convex functions is again convex.
Jul
18
reviewed Approve How find all complex numbers such that: $|\,1 - z\,| < k\ (1 - |\,z\,|\, )$?
Jul
17
reviewed Reject Finding the range of the function $f(x) = 3-4x$
Jul
14
awarded  Nice Answer
Jul
2
reviewed Approve Infinite closed shift-invariant set of binary sequences with zero entropy?
Jun
26
reviewed Approve Number of bit strings with 3 consecutive zeros or 4 consecutive 1s
Jun
23
reviewed Approve If $f(x) = x^5 + x^3 + x$ find $f^{-1}(3)$ and $f(f^{-1}(2))$
Jun
15
reviewed Approve How did my teacher go from this step to another? | Advanced Functions | Trigonemetry
Jun
12
reviewed Approve Partial derivative of sums with different index's