Question

Inverse Semigroups, Partial Bijections, and Semilattice of Idempotents

score 136 · Answer 1 · 2026-02-23 04:56:33

136

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Inverse Semigroups, Partial Bijections, and Semilattice of Idempotents

Published on 23 Feb 2026 - 4:56

score 71 · Answer 2 · 2021-01-30 08:38:23

71

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Condition on a parameter for a certain matrix to be idempotent

Published on 30 Jan 2021 - 8:38

score 77 · Answer 3 · 2021-02-01 17:45:43

77

Views

Show that in a group $G$ there is exactly one element $g$ for which $g^2 = g$?

Published on 01 Feb 2021 - 17:45

score 228 · Answer 4 · 2021-02-10 23:42:54

228

Views

Idempotents in $n \times n$ matrices with entries in $Z_2$

Published on 10 Feb 2021 - 23:42

score 74 · Answer 5 · 2021-02-18 10:32:56

74

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All idempotents are central then $KG$ has no nilpotent

Published on 18 Feb 2021 - 10:32

score 198 · Answer 6 · 2021-02-21 15:44:33

198

Views

Question about split idempotent in triangulated categories

Published on 21 Feb 2021 - 15:44

score 88 · Answer 7 · 2021-02-23 08:09:08

88

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If we know that $P^2=P$, show that $(I+P)^{-1}=I-\frac{1}{2}P$

Published on 23 Feb 2021 - 8:09

score 268 · Answer 8 · 2021-03-07 23:05:54

268

Views

Exercise 2.26 (Idempotents and products) from Eisenbud's Commutative Algebra

Published on 07 Mar 2021 - 23:05

score 163 · Answer 9 · 2021-03-15 04:00:19

163

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Why is the linear Span of the idempotents in a Banach algebra a Lie ideal?

Published on 15 Mar 2021 - 4:00

score 120 · Answer 10 · 2021-03-21 22:11:30

120

Views

Idempotent endomorphism: show $M=\text{Range}(f) \oplus \text{Range}(\text{id} - f)$

Published on 21 Mar 2021 - 22:11

score 55 · Answer 11 · 2021-03-22 00:14:21

55

Views

$\underset{K}{\operatorname{arg min}} [tr(KDK^TA)-tr(K^TA)]$ when $K$ is idempotent and $D$ diagonal?

Published on 22 Mar 2021 - 0:14

score 108 · Answer 12 · 2021-03-31 21:16:40

108

Views

Idempotent elements in a C^*- algebra

Published on 31 Mar 2021 - 21:16

score 65 · Answer 13 · 2021-04-01 15:16:22

65

Views

Product of non-idempotent elements in a commutative monoid

Published on 01 Apr 2021 - 15:16

score 312 · Answer 14 · 2021-04-02 18:33:18

312

Views

Idempotent elements of $Z_4 \times Z_8$

Published on 02 Apr 2021 - 18:33

score 1.1k · Answer 15 · 2021-04-02 19:11:42

1.1k

Views

Why is $I$ the only idempotent matrix with nonzero determinant?

Published on 02 Apr 2021 - 19:11

List Question

Inverse Semigroups, Partial Bijections, and Semilattice of Idempotents

Condition on a parameter for a certain matrix to be idempotent

Show that in a group $G$ there is exactly one element $g$ for which $g^2 = g$?

Idempotents in $n \times n$ matrices with entries in $Z_2$

All idempotents are central then $KG$ has no nilpotent

Question about split idempotent in triangulated categories

If we know that $P^2=P$, show that $(I+P)^{-1}=I-\frac{1}{2}P$

Exercise 2.26 (Idempotents and products) from Eisenbud's Commutative Algebra

Why is the linear Span of the idempotents in a Banach algebra a Lie ideal?

Idempotent endomorphism: show $M=\text{Range}(f) \oplus \text{Range}(\text{id} - f)$

$\underset{K}{\operatorname{arg min}} [tr(KDK^TA)-tr(K^TA)]$ when $K$ is idempotent and $D$ diagonal?

Idempotent elements in a C^*- algebra

Product of non-idempotent elements in a commutative monoid

Idempotent elements of $Z_4 \times Z_8$

Why is $I$ the only idempotent matrix with nonzero determinant?

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