Question

Compute the $m$th derivative of the sigmoid function $x(t)=1/(1+e^{-at})$

score 654 · Answer 1 · 2026-03-30 05:15:31

654

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Compute the $m$th derivative of the sigmoid function $x(t)=1/(1+e^{-at})$

Published on 30 Mar 2026 - 5:15

score 31 · Answer 2 · 2018-12-18 13:04:41

31

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Polynomial with properties at its zeroes - Linear Algebra

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score 78 · Answer 3 · 2018-12-19 06:27:09

78

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Published on 19 Dec 2018 - 6:27

score 45 · Answer 4 · 2018-12-19 08:00:02

45

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Finding $f(x,y) \in \mathbb{C}[x,y]$ such that $f(a,y)=f(b,y)=1$

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score 97 · Answer 5 · 2026-03-26 21:26:12

97

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How to show $7^{th}$ degree polynomial is non-positive in $[0,1]$

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score 230 · Answer 6 · 2026-03-28 01:48:42

If $a$ and $b$ are integers s.t. $2x^2 -ax + 2 > 0$ and $x^2 -b x + 8 \geq 0$ for all real numbers $x$, then the largest possible value of $2a−6b$ is

score 98 · Answer 7 · 2018-12-19 20:29:15

98

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When are $z^n - 1$ and $(z+1)^n - 1$ relatively prime?

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score 2.4k · Answer 8 · 2026-04-01 18:31:48

2.4k

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Relation between roots of function and roots of its derivative

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score 94 · Answer 9 · 2026-04-01 18:35:05

94

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score 256 · Answer 10 · 2026-03-25 17:38:30

256

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make c the subject $c+1=\sqrt{a-ac^2}$

Published on 25 Mar 2026 - 17:38

score 67 · Answer 11 · 2026-04-06 06:26:34

67

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Finding all $\lambda \in \mathbb{C}$ such that $f(t)-\lambda$ is separable

Published on 06 Apr 2026 - 6:26

score 326 · Answer 12 · 2018-12-20 19:09:16

326

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Published on 20 Dec 2018 - 19:09

score 82 · Answer 13 · 2026-03-25 22:09:57

82

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score 78 · Answer 14 · 2026-03-25 23:39:12

78

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Are elementary symmetric polynomials evaluated in powers of double cosines of rational multiples of $\pi$ integer?

Published on 25 Mar 2026 - 23:39

score 123 · Answer 15 · 2018-12-21 11:12:50

123

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Non-real complex numbers are roots of polynomials with positive real coefficients

Published on 21 Dec 2018 - 11:12

List Question

Compute the $m$th derivative of the sigmoid function $x(t)=1/(1+e^{-at})$

Polynomial with properties at its zeroes - Linear Algebra

One of zeros of convex combination of polynomials goes to infinity?

Finding $f(x,y) \in \mathbb{C}[x,y]$ such that $f(a,y)=f(b,y)=1$

How to show $7^{th}$ degree polynomial is non-positive in $[0,1]$

If $a$ and $b$ are integers s.t. $2x^2 -ax + 2 > 0$ and $x^2 -b x + 8 \geq 0$ for all real numbers $x$, then the largest possible value of $2a−6b$ is

When are $z^n - 1$ and $(z+1)^n - 1$ relatively prime?

Relation between roots of function and roots of its derivative

How would you solve for the complex roots of a polynomial with a greater degree than two?

make c the subject $c+1=\sqrt{a-ac^2}$

Finding all $\lambda \in \mathbb{C}$ such that $f(t)-\lambda$ is separable

Formula for product of two polynomials

About a statement of partial fraction in an answer

Are elementary symmetric polynomials evaluated in powers of double cosines of rational multiples of $\pi$ integer?

Non-real complex numbers are roots of polynomials with positive real coefficients

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