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May
13
answered The difference between the algebraic torus and the geometric torus
May
13
comment $\sum_{k=1}^\infty\frac{kx^{k-1}}{(k-1)!}=e^x$?
The last line. You forgot the $E(X)^2$ term.
May
13
comment $\sum_{k=1}^\infty\frac{kx^{k-1}}{(k-1)!}=e^x$?
The variance is $E(X^2) - E(X)^2$, not $E(X^2)$. The manipulation of the power series is correct, but the last formula isn't.
May
13
comment $\sum_{k=1}^\infty\frac{kx^{k-1}}{(k-1)!}=e^x$?
You are not wrong.
May
13
revised Naturality in linear algebra
added 96 characters in body
May
13
answered Naturality in linear algebra
May
10
revised Question about radius of convergence.
added 10 characters in body
May
10
revised Question about radius of convergence.
added 10 characters in body
May
10
answered Question about radius of convergence.
May
10
revised D'Alembert's functional equation. I need to solve this problem
added latex rendering
May
2
answered Finding Jordan form of a specific matrix
May
2
answered Sums of vector spaces and their dimensions
Apr
27
reviewed Approve Whats the difference between Antisymmetric and reflexive? (Set Theory/Discrete math)
Apr
24
comment Eigen value and transpose of the $Matrix$
Which linear operator has eigenvalue $1$ with geometric multiplicity $\dim V$? What is then the relation between $A$ and $B$?
Apr
22
comment T,S: V->V, proove that TS and ST have the same eigenvalues
people.math.sc.edu/howard/Classes/700/charAB.pdf
Apr
16
revised Evaluating norm of the operator
corrected notation error (x_n instead of z_n)
Apr
16
revised Find multivariable limit $\frac{x^2y}{x^2+y^3}$
Replaced a wrong solution with a correct one.
Apr
16
answered Find multivariable limit $\frac{x^2y}{x^2+y^3}$
Mar
25
answered show invariant subspace is direct sum decomposition
Mar
25
reviewed Approve Is Linear Algebra the foundation of Applied Mathematics?