Question

How does substituting $ u = y' $ in $ y''(t) - y'(t) = y(t) y'(t) $ reduce it to $ uu' − u = yu $?

score 52 · Answer 1 · 2021-11-07 18:51:10

52

Views

How does substituting $ u = y' $ in $ y''(t) - y'(t) = y(t) y'(t) $ reduce it to $ uu' − u = yu $?

Published on 07 Nov 2021 - 18:51

score 268 · Answer 2 · 2021-11-08 15:50:20

268

Views

How do I calculate the z-partial derivative of $f(x, y, z)$ where $z=x+y$?

Published on 08 Nov 2021 - 15:50

score 542 · Answer 3 · 2021-11-10 19:35:09

542

Views

Why don't we include the minus sign in this integral?

Published on 10 Nov 2021 - 19:35

score 532 · Answer 4 · 2026-03-29 18:50:35

532

Views

Trying to understand lambda calculus substitution rules w.r.t. to free and bound variables?

Published on 29 Mar 2026 - 18:50

score 124 · Answer 5 · 2026-04-02 02:54:13

124

Views

Exercise on the sum of points on an elliptic curve from the book Elliptic Curves Number Theory and Cryptography

Published on 02 Apr 2026 - 2:54

score 146 · Answer 6 · 2021-11-15 15:54:45

146

Views

How do I evaluate the integral $\int \frac{\sqrt{9+x^{2}}}{x^{4}} dx$?

Published on 15 Nov 2021 - 15:54

score 7.3k · Answer 7 · 2021-11-18 00:27:12

7.3k

Views

How does one compute the integral of 1/(x^2+3)

Published on 18 Nov 2021 - 0:27

score 165 · Answer 8 · 2021-11-18 04:00:24

165

Views

Is it hard to evaluate the integral $\int_{0}^{1} \frac{x^{3} \ln \left(\frac{1+x}{1-x}\right)}{\sqrt{1-x^{2}}} d x$?

Published on 18 Nov 2021 - 4:00

score 61 · Answer 9 · 2021-11-20 17:18:00

61

Views

How can I calculate $\int_{-\infty}^{\infty}e^{-x^2+ix}dx$?

Published on 20 Nov 2021 - 17:18

score 208 · Answer 10 · 2026-03-29 20:23:42

208

Views

A concrete definition of scope in lambda calculus that can be applied to determine which variables are bound and which are free

Published on 29 Mar 2026 - 20:23

score 172 · Answer 11 · 2026-02-23 22:19:20

172

Views

Substitution in sequent calculus vs substitution in lambda calculus

Published on 23 Feb 2026 - 22:19

score 194 · Answer 12 · 2021-11-26 04:28:00

194

Views

Why does integration by parts give me the wrong answer?

Published on 26 Nov 2021 - 4:28

score 220 · Answer 13 · 2021-11-28 02:28:02

220

Views

Is this a rigorous derivation? What justifies this step? $\lim_{h\to 0} \frac{e^h -1}{h}$

Published on 28 Nov 2021 - 2:28

score 101 · Answer 14 · 2021-11-29 05:06:15

101

Views

Show that $\int_1^3f(x)dx+\int_{11}^{13}f(x)dx\ge\int_5^9f(x)dx$

Published on 29 Nov 2021 - 5:06

score 317 · Answer 15 · 2026-03-30 12:28:14

317

Views

Is $u$ substitution nothing more than a change of coordinate but in $1$ dimension

Published on 30 Mar 2026 - 12:28

List Question

How does substituting $ u = y' $ in $ y''(t) - y'(t) = y(t) y'(t) $ reduce it to $ uu' − u = yu $?

How do I calculate the z-partial derivative of $f(x, y, z)$ where $z=x+y$?

Why don't we include the minus sign in this integral?

Trying to understand lambda calculus substitution rules w.r.t. to free and bound variables?

Exercise on the sum of points on an elliptic curve from the book Elliptic Curves Number Theory and Cryptography

How do I evaluate the integral $\int \frac{\sqrt{9+x^{2}}}{x^{4}} dx$?

How does one compute the integral of 1/(x^2+3)

Is it hard to evaluate the integral $\int_{0}^{1} \frac{x^{3} \ln \left(\frac{1+x}{1-x}\right)}{\sqrt{1-x^{2}}} d x$?

How can I calculate $\int_{-\infty}^{\infty}e^{-x^2+ix}dx$?

A concrete definition of scope in lambda calculus that can be applied to determine which variables are bound and which are free

Substitution in sequent calculus vs substitution in lambda calculus

Why does integration by parts give me the wrong answer?

Is this a rigorous derivation? What justifies this step? $\lim_{h\to 0} \frac{e^h -1}{h}$

Show that $\int_1^3f(x)dx+\int_{11}^{13}f(x)dx\ge\int_5^9f(x)dx$

Is $u$ substitution nothing more than a change of coordinate but in $1$ dimension

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