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Apr
21
comment How to solve this for $k_i$?
Not the $k_i$ are increasing, the function $x \mapsto 2^{-x}$ is decreasing. That is, if say $k_j$ is the min, i. e. $k_i \ge k_j$ for all $i$, we have that $2^{-k_i} \le 2^{-k_j}$ for all $i$, that is $2^{-k_j}$ is the max. So $2^{-\min_i k_i} = \max_i 2^{-k_i}$.
Apr
21
answered How to solve this for $k_i$?
Apr
21
answered Derivative of Matrix Exponential as Integral
Apr
21
answered Absolutely integrable function not of exponential order
Apr
20
revised Differential equation problam
TeXification
Apr
17
revised For which values of the parameter $p$ the following series is convergent?
added 3 characters in body
Apr
16
reviewed Approve How do you prove that a metric space $X$ is separable if and only if $X$ has a countable subset $Y$ with property below?
Apr
16
comment Solving integral $\int \frac{3x-1}{\left(x^2+16\right)^3}$
You have already computed the partial fraction decomposition. This fraction cannot by decomposed any more. Go on to the next step ... integrate ... see above!
Apr
16
reviewed Looks OK Revised Simplex Method w/o Identity Matrix
Apr
16
reviewed Looks OK Proving the limit of a nested sequence
Apr
16
reviewed Looks OK Converting nonlinear second order ODE to first order
Apr
16
answered Solving integral $\int \frac{3x-1}{\left(x^2+16\right)^3}$
Apr
16
answered Two-sided limits using advanced algebra
Apr
16
comment if f is continuous almost everywhere , must there exist a function g such that g=f almost everywhere and g is continuous?
@user156441 Feel free to ask this as a new question ...
Apr
14
answered Diagonalization: Eigenvalues Vs Elementary Row Operations
Apr
14
comment Understanding Asymptotic Notation of a constant
In what sense is Knuth's definition stronger? If $c := \limsup |f(n)| > 0$, we have that finally $|f(n)| > \frac c2$. That is, finally $1 \le \frac 2c|f(n)|$ or $1 = O(f)$.
Apr
14
answered Use Euclid's algorithm to find the multiplicative inverse $11$ modulo $59$
Apr
14
comment Matrix norm optimization problem : $\min_{\textit{ }x} \| A x B \|_4$, $x$ in the “unit” circle
$x=0$ (in the correct format) will do it.
Apr
14
awarded  analysis
Apr
13
awarded  Reviewer