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1d
comment Expected time until reaching absorbing state of Markov chain
So smaller clusters cannot combine into larger ones or break up into smaller ones in your model?
1d
comment Is it possible to prove $\arg\min_a f(\max(\mathbf{a}^T\mathbf{b}_i)) = \arg\min_a f(\mathbf{a}^T\max(\mathbf{b}_i))$
What do you mean by $f(\max(\mathbf{a}^T\mathbf{b}_i))$? For each $i$, this is a separate and different function of the vector $\mathbf{a}$.
Jul
20
comment Logistic Regression as Data Transform
@Michael - my point is that fits from a regression (logistic or otherwise) always look nice, both to the naked eye and to statistical procedures, merely by design.
Jul
19
comment Generalization of method of least squares to matrix system (Pseudo inverse?)
Welcome to math.stackexchange! Which matrix norm are you using?
Jul
18
comment Logistic Regression as Data Transform
How is this different from using simple regression to fit a straight line to some data and then finding that all predicted values lie on a straight line?
Jul
17
reviewed Close For which integers $r$ is $\sigma ^r$ also a $k$-cycle?
Jul
17
reviewed Close Limit of a multidimensional function
Jul
17
reviewed Close Find the number of units in $M_2(\mathbb Z_p)$ where $p$ is prime.
Jul
17
reviewed Leave Open Prove that $\cos^2(\theta) + \cos^2(\theta +120^{\circ}) + \cos^2(\theta-120^{\circ})=3/2$
Jul
17
reviewed Approve Distances from interior point to vertices of triangle
Jul
16
answered Applying Gronwall's Inequality
Jul
16
answered How can mathematical models be applied to image analysis
Jul
15
answered proof of existence of a solution with $ f \in L^1$
Jul
15
comment Prove that if $a^2+b^2$ is a multiple of three, then a and b are multiples of three
If a number is a multiple of 3, then its remainder when divided by 3 is zero. Now try some cases where $a$ or $b$ or both are not divisible by 3 and compute the remainder of $a^2 + b^2$ when divided by 3 in all cases. Make a table. Can you guess a pattern?
Jul
15
revised Applications of Neyman-Pearson-Lemma
deleted 1 character in body
Jul
15
answered Applications of Neyman-Pearson-Lemma
Jul
15
revised how to solve $\int_{-\infty}^\infty e^{-x^2-x{\tau}} \cdot x\ dx$?
edited title
Jul
15
comment Existence of an metric or a topology so that every subset is compact
@MikeMiller - recall that the OP asked about metric spaces with this property, and these are Hausdorff.
Jul
14
answered Existence of an metric or a topology so that every subset is compact
Jul
12
comment Infinite derivative of nested radicals
Since the derivative of the answer is the same as the answer, this must be a multiple of $e^x$. That is, if this makes any sense at all.