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seen Sep 25 at 0:02

Mar
4
reviewed Approve suggested edit on Show that $\sum\limits_{k=0}^\infty (-1)^k \frac{1}{\sqrt{k+1}}$ converges but not absolutely
Mar
4
reviewed Close Proving $1 + 1 = 2$
Mar
4
reviewed Leave Open Use a differential to estimate to estimate the given quantity.
Jan
23
reviewed Close Compute $\displaystyle\iint\limits_R\frac{y}{x+y^2}dA$ where $R=[0,1]\times[1,2]$
Dec
29
reviewed Leave Open Project Euler - 34 / Find a mathematical approach for upper bound
Dec
28
reviewed Close Is there an identity that links $\pi$ and $\phi$ (the golden ratio)?
Dec
28
reviewed Leave Open Why is the number Pi more popular than any other constant?
Dec
10
comment Stability of the System of Differential Equations
For 1) you need initial conditions, since $A' + B' + C' =0$ only imply that $A + B + C = k$, where $k$ is a constant. To show stability, you'll have to linearize around the stationary solution and see what's happening with the eigenvalues.
Dec
10
reviewed Looks OK Discrete math help w/propsitions
Dec
10
reviewed No Action Needed Graphing Square Root Function
Dec
10
reviewed Approve suggested edit on Prove that the function is constant $f(x)=\arcsin2x\sqrt{1-x^{2}} - 2\arcsin x$
Dec
10
reviewed Approve suggested edit on Is impulse response always differentiation of unit step response of a system?
Dec
10
reviewed Close Prove that the function is constant $f(x)=\arcsin2x\sqrt{1-x^{2}} - 2\arcsin x$
Dec
4
reviewed Leave Open Problem with tau function
Dec
4
revised Help solving a differential equation using Green function
edited tags
Dec
4
reviewed Looks OK If $x_1, \ldots, x_6$ are positive real numbers that add up to $2$. Show that:
Dec
4
awarded  Custodian
Dec
4
reviewed Leave Open Area using Fermat's method of quadratures
Dec
4
reviewed Close Solution book of John Kelley's , J.Munkres's
Dec
4
reviewed Leave Open Can Jacobian be treated as a transform?