Question

Prove that there exists a subspace $W'$ and a function $T:V\rightarrow V$ such that $T$ is a projection on $W$

score 138 · Answer 1 · 2026-03-27 08:57:07

138

Views

Prove that there exists a subspace $W'$ and a function $T:V\rightarrow V$ such that $T$ is a projection on $W$

Published on 27 Mar 2026 - 8:57

score 455 · Answer 2 · 2026-04-02 19:18:43

455

Views

Questionable Proof in Visual Complex Analysis

Published on 02 Apr 2026 - 19:18

score 45 · Answer 3 · 2020-04-04 17:57:07

45

Views

Prove that any two simple extensions of $\Bbb{R}$ are isomorphic (hence isomorphic to $\Bbb{C}$)

Published on 04 Apr 2020 - 17:57

score 28 · Answer 4 · 2020-04-04 18:08:37

28

Views

Find $c(x,y), d(x,y) \in F[x,y]$ such that $a(x,y)c(x,y) + b(x,y)d(x,y)$ is a non-zero polynomial in $F[X]$

Published on 04 Apr 2020 - 18:08

score 35 · Answer 5 · 2026-03-27 00:10:04

35

Views

Convert $\dddot{y}(t) = (\dot{y}(t)- y(t))^2 + 3\sin{(t)}y(t)$ and $\ddot{y}(t) = \dot{y}(t) -y(t)^2$ into 1. Order IVP.

Published on 27 Mar 2026 - 0:10

score 172 · Answer 6 · 2026-03-25 18:57:43

172

Views

Prove $\{a(c):a(x) \in F[x]\}$ is an integral domain isomorphic to $F[x]$

Published on 25 Mar 2026 - 18:57

score 50 · Answer 7 · 2026-03-26 13:52:16

50

Views

Elliptic Paraboloid, and Plane $y=1$, and Rate in respect to $x$ at point $P(2,1,7)$

Published on 26 Mar 2026 - 13:52

score 71 · Answer 8 · 2026-04-02 19:15:29

71

Views

if $\sum a_n$ is a divergent series of positive terms then so is $\sum \sqrt{a_n}$

Published on 02 Apr 2026 - 19:15

score 3.2k · Answer 9 · 2020-04-04 22:19:34

3.2k

Views

Prove that $\text{span}(S_{1}\cap S_{2})\subseteq \text{span}(S_{1})\cap\text{span}(S_{2})$.

Published on 04 Apr 2020 - 22:19

score 1.1k · Answer 10 · 2026-03-27 03:41:45

1.1k

Views

Proof of the Nine Lemma using the Snake Lemma

Published on 27 Mar 2026 - 3:41

score 104 · Answer 11 · 2026-03-31 18:35:47

104

Views

Is this a valid proof that $e$ is irrational?

Published on 31 Mar 2026 - 18:35

score 2.4k · Answer 12 · 2020-04-05 00:44:23

2.4k

Views

Prove that $T$ is one-to-one iff $T$ carries linearly independent subsets of $V$ onto lineraly independent subsets of $W$.

Published on 05 Apr 2020 - 0:44

score 105 · Answer 13 · 2020-04-05 01:19:51

105

Views

If $X_1,\dots,X_{100}$ are iid continuous rvs, find $P(X_{12}\text{ is the smallest and }X_{20}\text{ is the largest})$

Published on 05 Apr 2020 - 1:19

score 99 · Answer 14 · 2020-04-05 01:30:58

99

Views

I must prove that $\lim_{\mu(A)\rightarrow 0}\int_{A}\lvert f \lvert{\rm d}\mu=0$.

Published on 05 Apr 2020 - 1:30

score 610 · Answer 15 · 2026-03-26 02:46:47

610

Views

Proving a quadrilateral may have at most four axes of symmetry

Published on 26 Mar 2026 - 2:46

List Question

Prove that there exists a subspace $W'$ and a function $T:V\rightarrow V$ such that $T$ is a projection on $W$

Questionable Proof in Visual Complex Analysis

Prove that any two simple extensions of $\Bbb{R}$ are isomorphic (hence isomorphic to $\Bbb{C}$)

Find $c(x,y), d(x,y) \in F[x,y]$ such that $a(x,y)c(x,y) + b(x,y)d(x,y)$ is a non-zero polynomial in $F[X]$

Convert $\dddot{y}(t) = (\dot{y}(t)- y(t))^2 + 3\sin{(t)}y(t)$ and $\ddot{y}(t) = \dot{y}(t) -y(t)^2$ into 1. Order IVP.

Prove $\{a(c):a(x) \in F[x]\}$ is an integral domain isomorphic to $F[x]$

Elliptic Paraboloid, and Plane $y=1$, and Rate in respect to $x$ at point $P(2,1,7)$

if $\sum a_n$ is a divergent series of positive terms then so is $\sum \sqrt{a_n}$

Prove that $\text{span}(S_{1}\cap S_{2})\subseteq \text{span}(S_{1})\cap\text{span}(S_{2})$.

Proof of the Nine Lemma using the Snake Lemma

Is this a valid proof that $e$ is irrational?

Prove that $T$ is one-to-one iff $T$ carries linearly independent subsets of $V$ onto lineraly independent subsets of $W$.

If $X_1,\dots,X_{100}$ are iid continuous rvs, find $P(X_{12}\text{ is the smallest and }X_{20}\text{ is the largest})$

I must prove that $\lim_{\mu(A)\rightarrow 0}\int_{A}\lvert f \lvert{\rm d}\mu=0$.

Proving a quadrilateral may have at most four axes of symmetry

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