Question

Confusion about relationship between operator $K$-theory and topological $K$-theory

score 90 · Answer 1 · 2026-03-20 04:13:39

90

Views

Confusion about relationship between operator $K$-theory and topological $K$-theory

Published on 20 Mar 2026 - 4:13

score 811 · Answer 2 · 2026-03-12 10:34:10

811

Views

Proving that the smallest perimeter polygon that contains a set of points is convex

Published on 12 Mar 2026 - 10:34

score 1.2k · Answer 3 · 2026-03-21 17:57:06

1.2k

Views

$\inf A = -\sup (-A)$

Published on 21 Mar 2026 - 17:57

score 92 · Answer 4 · 2026-03-12 09:54:16

92

Views

Is there something wrong about my solution to $\int \frac{1}{\sin(x) + \cos(x)} dx$?

Published on 12 Mar 2026 - 9:54

score 73 · Answer 5 · 2026-03-21 19:34:35

73

Views

Maximize the function

Published on 21 Mar 2026 - 19:34

score 1.4k · Answer 6 · 2026-03-17 10:26:16

1.4k

Views

Prove that any truth function $f$ can be represented by a formula $φ$ in cnf by negating a formula in dnf

Published on 17 Mar 2026 - 10:26

score 137 · Answer 7 · 2026-03-21 04:30:41

137

Views

Why : $1^{+\infty}$ is not $1 $ however $1^{+\infty}=\lim _{x\to 0+}(\frac{\sin x}{x})^{1/x}=1$?

Published on 21 Mar 2026 - 4:30

score 110 · Answer 8 · 2026-03-24 04:10:35

110

Views

Why are extraneous solutions created here?

Published on 24 Mar 2026 - 4:10

score 60 · Answer 9 · 2026-03-17 17:20:08

60

Views

Using the calculus of one forms prove this identity

Published on 17 Mar 2026 - 17:20

score 152 · Answer 10 · 2026-03-18 02:14:15

152

Views

Is my method correct for to prove $a^{\log_b c} = c^{\log_b a}$?

Published on 18 Mar 2026 - 2:14

score 110 · Answer 11 · 2026-03-17 11:20:32

110

Views

Proof that $\mathrm{Var}\bigg(\frac{1}{n} \sum_{i=1}^nY_i\bigg) = \frac{1}{n}\mathrm{Var}(Y_1)$

Published on 17 Mar 2026 - 11:20

score 308 · Answer 12 · 2026-03-12 11:01:54

308

Views

If $G$ is group isomorphic to $H$, then ${\rm Aut}(G)$ is isomorphic to ${\rm Aut}(H)$.

Published on 12 Mar 2026 - 11:01

score 323 · Answer 13 · 2026-03-22 06:43:30

323

Views

Show that this function is concave?

Published on 22 Mar 2026 - 6:43

score 86 · Answer 14 · 2026-03-23 00:39:47

86

Views

Proof verifications: Elementary composition proofs. (if $g\circ f$ is one-to-one, then show $f$ is one-to-one etc.)

Published on 23 Mar 2026 - 0:39

score 192 · Answer 15 · 2026-03-22 05:15:56

192

Views

Problem 1.70 of Megginson's "An Introduction to Banach Space Theory"

Published on 22 Mar 2026 - 5:15

List Question

Confusion about relationship between operator $K$-theory and topological $K$-theory

Proving that the smallest perimeter polygon that contains a set of points is convex

$\inf A = -\sup (-A)$

Is there something wrong about my solution to $\int \frac{1}{\sin(x) + \cos(x)} dx$?

Maximize the function

Prove that any truth function $f$ can be represented by a formula $φ$ in cnf by negating a formula in dnf

Why : $1^{+\infty}$ is not $1 $ however $1^{+\infty}=\lim _{x\to 0+}(\frac{\sin x}{x})^{1/x}=1$?

Why are extraneous solutions created here?

Using the calculus of one forms prove this identity

Is my method correct for to prove $a^{\log_b c} = c^{\log_b a}$?

Proof that $\mathrm{Var}\bigg(\frac{1}{n} \sum_{i=1}^nY_i\bigg) = \frac{1}{n}\mathrm{Var}(Y_1)$

If $G$ is group isomorphic to $H$, then ${\rm Aut}(G)$ is isomorphic to ${\rm Aut}(H)$.

Show that this function is concave?

Proof verifications: Elementary composition proofs. (if $g\circ f$ is one-to-one, then show $f$ is one-to-one etc.)

Problem 1.70 of Megginson's "An Introduction to Banach Space Theory"

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