Question

Proof that number ending in $66$ or $06$ is congruent to $2 \text{ mod } 4$

score 96 · Answer 1 · 2026-04-16 03:29:46

96

Views

Proof that number ending in $66$ or $06$ is congruent to $2 \text{ mod } 4$

Published on 16 Apr 2026 - 3:29

score 1.5k · Answer 2 · 2026-04-17 12:58:32

1.5k

Views

Is there any way to systematically do all epsilon delta proofs?

Published on 17 Apr 2026 - 12:58

score 49 · Answer 3 · 2026-04-14 16:17:03

49

Views

Prove or disprove: Given signature and structures, isomorphism... Then the structure is unique

Published on 14 Apr 2026 - 16:17

score 53 · Answer 4 · 2026-04-15 18:33:20

53

Views

Modular arithmetic property proof

Published on 15 Apr 2026 - 18:33

score 894 · Answer 5 · 2026-04-13 23:20:51

894

Views

Is my proof of straight line being the shortest route from one point to another correct?

Published on 13 Apr 2026 - 23:20

score 38 · Answer 6 · 2026-04-16 22:28:05

38

Views

Adding extra digit $1$ or $7$ to a multidigit number changes remainder mod $3$

Published on 16 Apr 2026 - 22:28

score 43 · Answer 7 · 2026-04-13 19:05:12

43

Views

Proof that adding an integer $k$ to the end of a prime $p$, $p$ times makes the new value divisible by $p$

Published on 13 Apr 2026 - 19:05

score 64 · Answer 8 · 2026-04-09 06:45:46

64

Views

Proof verification: proof with families of sets

Published on 09 Apr 2026 - 6:45

score 280 · Answer 9 · 2026-04-15 16:37:02

280

Views

$\varepsilon-\delta$ Proof: $\lim\limits_{x\to0}e^x=1$

Published on 15 Apr 2026 - 16:37

score 303 · Answer 10 · 2026-04-12 00:01:55

303

Views

Proof that If Two Homogeneous System in two unknowns has the same solutions, they are equivalent

Published on 12 Apr 2026 - 0:01

score 413 · Answer 11 · 2026-04-11 14:48:26

413

Views

Showing existence of non-negative solution to matrix equation $Ax = b$

Published on 11 Apr 2026 - 14:48

score 191 · Answer 12 · 2026-04-13 01:21:23

191

Views

Checking all directional derivatives for higher dimensions using proof similar to polar coordinate method

Published on 13 Apr 2026 - 1:21

score 68 · Answer 13 · 2026-04-14 05:15:47

68

Views

Proof that a "$4$-word" can't exist in a recursive sequence

Published on 14 Apr 2026 - 5:15

score 26 · Answer 14 · 2026-04-09 23:12:55

26

Views

Which way of formulating a proposition in an article is better?

Published on 09 Apr 2026 - 23:12

score 214 · Answer 15 · 2026-04-12 09:59:33

214

Views

Prove that piecewise function is well-defined

Published on 12 Apr 2026 - 9:59

List Question

Proof that number ending in $66$ or $06$ is congruent to $2 \text{ mod } 4$

Is there any way to systematically do all epsilon delta proofs?

Prove or disprove: Given signature and structures, isomorphism... Then the structure is unique

Modular arithmetic property proof

Is my proof of straight line being the shortest route from one point to another correct?

Adding extra digit $1$ or $7$ to a multidigit number changes remainder mod $3$

Proof that adding an integer $k$ to the end of a prime $p$, $p$ times makes the new value divisible by $p$

Proof verification: proof with families of sets

$\varepsilon-\delta$ Proof: $\lim\limits_{x\to0}e^x=1$

Proof that If Two Homogeneous System in two unknowns has the same solutions, they are equivalent

Showing existence of non-negative solution to matrix equation $Ax = b$

Checking all directional derivatives for higher dimensions using proof similar to polar coordinate method

Proof that a "$4$-word" can't exist in a recursive sequence

Which way of formulating a proposition in an article is better?

Prove that piecewise function is well-defined

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