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May
7
reviewed Leave Open 2 Second Pendulum Length on The Moon
May
7
reviewed Leave Open $X$ is normal matrix and $AX=XB$ and $XA=BX$.why $A{X^*} = {X^*}B$ and ${X^*}A = B{X^*}$?
May
7
reviewed Leave Open Application of Ito's formula
May
7
reviewed Leave Open Order-preserving map of regressive functions on $\omega_1$
May
7
reviewed Close show $(x+1)^p = x^p$ + 1 (mod p)
May
7
reviewed Close Exponential Probability Question
May
7
reviewed Leave Open Describe a PDA that accepts the language L = {w | w = a^n b^n c^n , N > 0}
May
7
comment abstract algebra , ideal of a ring of matrices .
$\pi$ is onto ... given $r+I \in R/I$, then $\pi(r) = r+I$.
May
7
revised abstract algebra , ideal of a ring of matrices .
added 10 characters in body
May
7
comment abstract algebra , ideal of a ring of matrices .
Yes, you are right of course, $\pi[J]$ is an ideal ...
May
7
comment Approximating monotonically increasing differential equation
I don't now, I think its just multiplication. I do not like this notation either.
May
7
answered transformation of a difference equation
May
7
answered Is this element a subset of set A?
May
7
answered abstract algebra , ideal of a ring of matrices .
May
7
answered Using Ito's formula, write down a stochastic diferential equation satiesfied by $Y_t:=X_t^2$, given both $Y_t$ and $X_t$
May
7
answered Approximating monotonically increasing differential equation
May
7
answered $g$ has order $n$, then $\langle g\rangle=\langle g^2\rangle=\cdots=\langle g^{n-1}\rangle$
May
6
answered Why is T continuous?
May
6
answered Integral-derivative issue
May
6
answered Proof that $a^n \ne b^{n+1}, (a, b) \in \mathbb{Z}$