Question

Proving a Set is not a Vector Space (Using a Nonstandard Definition of Scalar Multiplication)

score 637 · Answer 1 · 2019-04-28 10:09:58

637

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Proving a Set is not a Vector Space (Using a Nonstandard Definition of Scalar Multiplication)

Published on 28 Apr 2019 - 10:09

score 92 · Answer 2 · 2019-04-29 00:28:54

92

Views

Limitations when working with classes, practical point of view

Published on 29 Apr 2019 - 0:28

score 307 · Answer 3 · 2019-04-29 20:26:12

307

Views

Simplest axiom that entails the existence of an infinite set

Published on 29 Apr 2019 - 20:26

score 38 · Answer 4 · 2019-05-03 15:12:34

38

Views

Prove $x<y \land z>0 \Rightarrow x\cdot z < y \cdot z$ for all$x,y,z\in \mathbb{K}$

Published on 03 May 2019 - 15:12

score 222 · Answer 5 · 2026-03-25 23:11:02

222

Views

Do Gödel's incompleteness theorems apply to finitist axiomatic systems that reject the axiom of infinity?

Published on 25 Mar 2026 - 23:11

score 485 · Answer 6 · 2026-02-23 12:02:40

485

Views

Are the following statements equivalent to the parallel postulate?

Published on 23 Feb 2026 - 12:02

score 86 · Answer 7 · 2019-05-09 08:39:51

86

Views

Removing EXPLICIT asymmetry in open set intersection vs. union axioms in topology.

Published on 09 May 2019 - 8:39

score 83 · Answer 8 · 2026-03-26 02:57:52

83

Views

Is Peano's axiom of induction needed to show $n^\prime\ne n^{\prime\prime}$?

Published on 26 Mar 2026 - 2:57

score 430 · Answer 9 · 2026-02-23 12:06:15

430

Views

If two medians are congruent... is the triangle isosceles in a Hilbert plane?

Published on 23 Feb 2026 - 12:06

score 266 · Answer 10 · 2019-05-22 06:21:01

266

Views

Finding a model for a set of axioms

Published on 22 May 2019 - 6:21

score 963 · Answer 11 · 2019-05-25 23:03:00

963

Views

proving that $-1$ and $1$ are the only units in $Z$, using the given axioms

Published on 25 May 2019 - 23:03

score 110 · Answer 12 · 2019-06-07 13:31:20

110

Views

Set is a structure.. or structure is a set.., which is correct?

Published on 07 Jun 2019 - 13:31

score 1k · Answer 13 · 2019-06-11 20:25:43

1k

Views

Finite Ordinals and Natural Numbers

Published on 11 Jun 2019 - 20:25

score 195 · Answer 14 · 2019-06-13 19:53:31

195

Views

Can uncountability of reals be proved only from the axioms?

Published on 13 Jun 2019 - 19:53

score 356 · Answer 15 · 2019-06-14 19:31:23

356

Views

What does Paul Halmos mean here?

Published on 14 Jun 2019 - 19:31

List Question

Proving a Set is not a Vector Space (Using a Nonstandard Definition of Scalar Multiplication)

Limitations when working with classes, practical point of view

Simplest axiom that entails the existence of an infinite set

Prove $x<y \land z>0 \Rightarrow x\cdot z < y \cdot z$ for all$x,y,z\in \mathbb{K}$

Do Gödel's incompleteness theorems apply to finitist axiomatic systems that reject the axiom of infinity?

Are the following statements equivalent to the parallel postulate?

Removing EXPLICIT asymmetry in open set intersection vs. union axioms in topology.

Is Peano's axiom of induction needed to show $n^\prime\ne n^{\prime\prime}$?

If two medians are congruent... is the triangle isosceles in a Hilbert plane?

Finding a model for a set of axioms

proving that $-1$ and $1$ are the only units in $Z$, using the given axioms

Set is a structure.. or structure is a set.., which is correct?

Finite Ordinals and Natural Numbers

Can uncountability of reals be proved only from the axioms?

What does Paul Halmos mean here?

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