Question

Is this proof on relation and equivalence classes correct?

score 45 · Answer 1 · 2026-03-26 12:05:49

45

Views

Is this proof on relation and equivalence classes correct?

Published on 26 Mar 2026 - 12:05

score 119 · Answer 2 · 2026-03-25 07:36:52

119

Views

How many functions are possible to create in this example?

Published on 25 Mar 2026 - 7:36

score 173 · Answer 3 · 2026-03-26 15:16:57

173

Views

When proving that the determinant of an odd dimension anti-symmetric matrix is zero, how it it that -det(A) implies that det(A) =0?

Published on 26 Mar 2026 - 15:16

score 625 · Answer 4 · 2026-03-25 16:40:01

625

Views

If a triangle is not equilateral, must its orthocenter and circumcenter be distinct?

Published on 25 Mar 2026 - 16:40

score 89 · Answer 5 · 2026-03-25 04:43:52

89

Views

Let $(F_n)_{n \in \mathbb{N}}$ be a Fibonacci sequence , then $(4 \mid n \Leftrightarrow 3 \mid F_n)$ for all $n \in \mathbb{N}$

Published on 25 Mar 2026 - 4:43

score 139 · Answer 6 · 2018-03-31 03:22:51

139

Views

Real Analysis: Uniform Continuity Proof Verification

Published on 31 Mar 2018 - 3:22

score 1.6k · Answer 7 · 2018-03-31 03:50:42

1.6k

Views

Proof verification: convergent series with a finite number of negative terms is Absolutely Convergent

Published on 31 Mar 2018 - 3:50

score 374 · Answer 8 · 2018-03-31 07:12:26

374

Views

Show that if a continuous function is positive at a point it is positive on an interval around that point

Published on 31 Mar 2018 - 7:12

score 69 · Answer 9 · 2026-03-25 04:41:02

69

Views

Proof verification: $\forall \epsilon\in\Bbb{Q^{+}}\exists x\in\Bbb{Q^{+}}(x^2<2<(x+\epsilon)^2)$

Published on 25 Mar 2026 - 4:41

score 1.4k · Answer 10 · 2026-03-25 04:53:57

1.4k

Views

Studying uniform continuity on a multivariable function.

Published on 25 Mar 2026 - 4:53

score 321 · Answer 11 · 2018-03-31 08:56:48

321

Views

Injectiveness and surjectiveness of $f$ and of $g$, respectively, of the composition $g\circ f$.

Published on 31 Mar 2018 - 8:56

score 60 · Answer 12 · 2018-03-31 12:22:03

60

Views

Let $f : R_+ \to R $ be a function that satisfies for all $x > 0, f(x) \geq 0$ and $f$ is stricly concave, show that $f$ is sub additive

Published on 31 Mar 2018 - 12:22

score 44 · Answer 13 · 2018-03-31 13:50:47

44

Views

Line Integral of a Field

Published on 31 Mar 2018 - 13:50

score 1.8k · Answer 14 · 2026-03-25 15:59:09

1.8k

Views

Parity check matrix determines minimal distance of a linear code.

Published on 25 Mar 2026 - 15:59

score 95 · Answer 15 · 2026-03-24 23:45:17

95

Views

Find all natural numbers $n$ for which $n = n'$

Published on 24 Mar 2026 - 23:45

List Question

Is this proof on relation and equivalence classes correct?

How many functions are possible to create in this example?

When proving that the determinant of an odd dimension anti-symmetric matrix is zero, how it it that -det(A) implies that det(A) =0?

If a triangle is not equilateral, must its orthocenter and circumcenter be distinct?

Let $(F_n)_{n \in \mathbb{N}}$ be a Fibonacci sequence , then $(4 \mid n \Leftrightarrow 3 \mid F_n)$ for all $n \in \mathbb{N}$

Real Analysis: Uniform Continuity Proof Verification

Proof verification: convergent series with a finite number of negative terms is Absolutely Convergent

Show that if a continuous function is positive at a point it is positive on an interval around that point

Proof verification: $\forall \epsilon\in\Bbb{Q^{+}}\exists x\in\Bbb{Q^{+}}(x^2<2<(x+\epsilon)^2)$

Studying uniform continuity on a multivariable function.

Injectiveness and surjectiveness of $f$ and of $g$, respectively, of the composition $g\circ f$.

Let $f : R_+ \to R $ be a function that satisfies for all $x > 0, f(x) \geq 0$ and $f$ is stricly concave, show that $f$ is sub additive

Line Integral of a Field

Parity check matrix determines minimal distance of a linear code.

Find all natural numbers $n$ for which $n = n'$

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