User Tom Collinge

12 votes

2 answers

4k views

Basis for Tensor Product of Infinite Dimensional Vector Spaces

asked Mar 6, 2015 at 8:59

12 votes

1 answer

377 views

Topology: reference for "Great Wheel of Compactness"

asked Dec 29, 2015 at 12:28

10 votes

1 answer

1k views

What's an Isomorphism?

asked Feb 11, 2016 at 11:34

10 votes

2 answers

2k views

Confused about Domain of Unbounded Operators (Hilbert Spaces)

asked Jul 6, 2016 at 11:58

10 votes

3 answers

4k views

Why is Multiplicative Notation Used for Groups (Instead of Additive)?

asked Jan 29, 2015 at 14:23

8 votes

2 answers

1k views

Confused about Euclidean Norm

asked Oct 14, 2015 at 9:17

7 votes

2 answers

1k views

What is the Relationship between a Closed Map and a Closed Linear Operator?

asked Aug 14, 2016 at 18:48

7 votes

2 answers

3k views

Definition of Essentially Self Adjoint Operators

asked Apr 10, 2017 at 8:51

7 votes

1 answer

394 views

Equivalence of Continuous Monotonic Functions $[0, 1] \to [0, 1]$

asked Aug 12, 2019 at 9:17

6 votes

3 answers

308 views

Every Cover of a Compact Real Interval by Open Intervals Has a Finite Subcover where only Consecutive Sets Overlap?

asked Jul 20, 2019 at 16:13

6 votes

1 answer

777 views

Vector Space: is there a general definition of annihilator beyond the dual space?

asked Apr 4, 2015 at 13:49

5 votes

1 answer

1k views

Is There a Common Definition of "Finite Support"?

asked Aug 11, 2015 at 10:47

5 votes

0 answers

616 views

Dense Subspaces and Orthonormal Bases.

asked Apr 27, 2017 at 13:10

5 votes

1 answer

1k views

Operators and Tensor Products

asked Dec 20, 2016 at 13:54

5 votes

1 answer

2k views

A Finite Dimensional non-Unitary Isometry?

asked Jan 10, 2017 at 13:38

5 votes

0 answers

432 views

A Homeomorphism is a Bijection between the Underlying Sets and between the Corresponding Topologies?

asked Feb 14, 2016 at 13:20

5 votes

0 answers

680 views

Understanding the Core of an Operator or Map.

asked May 16, 2018 at 9:56

4 votes

0 answers

823 views

Some Questions about Regulated Functions

asked May 4, 2019 at 9:07

4 votes

1 answer

282 views

Reparameterisation of Curve as a Regular Curve (Topology)

asked Jun 6, 2019 at 14:37

4 votes

2 answers

79 views

Understanding Direct Sums and Product (Vector Spaces)

asked Jan 3, 2021 at 14:20

4 votes

0 answers

90 views

History: Direct Product became Tensor Product?

asked Oct 9, 2020 at 8:43

4 votes

1 answer

897 views

Is an Infinite Dimensional Inner Product Space Isomorphic to its Continuous Dual Space?

asked Mar 25, 2016 at 9:17

4 votes

2 answers

402 views

For a Vector Space $V = A \oplus B = A \oplus C \implies \dim(B) = \dim(C) $?

asked May 18, 2016 at 7:24

4 votes

2 answers

885 views

Quantum Mechanics: position and the separability of Hilbert space?

asked Jun 19, 2016 at 14:19

4 votes

2 answers

48 views

An Algebraic Proof that $|y^3 - x^3| \ge |(y - x)|^3/4 $

asked Nov 17, 2015 at 12:33

4 votes

2 answers

2k views

Is a Linear Transformation a Vector Space Homomorphism?

asked May 9, 2015 at 11:35

3 votes

1 answer

961 views

Is this a Correct Proof of the Principle of Complete Induction for Natural Numbers in ZF?

asked May 17, 2014 at 12:15

3 votes

2 answers

348 views

Why is the measure of the reals not zero?

asked Oct 2, 2013 at 12:18

3 votes

1 answer

2k views

Linear Independence of Pre-Image

asked Jun 3, 2015 at 12:41

3 votes

1 answer

576 views

Example for $\text {End}(V \otimes W) $ not isomorphic to $\text{End}(V) \otimes \text{End}(W)$

asked Dec 24, 2016 at 11:51

Stack Exchange Network

112 Questions

Basis for Tensor Product of Infinite Dimensional Vector Spaces

Topology: reference for "Great Wheel of Compactness"

What's an Isomorphism?

Confused about Domain of Unbounded Operators (Hilbert Spaces)

Why is Multiplicative Notation Used for Groups (Instead of Additive)?

Confused about Euclidean Norm

What is the Relationship between a Closed Map and a Closed Linear Operator?

Definition of Essentially Self Adjoint Operators

Equivalence of Continuous Monotonic Functions $[0, 1] \to [0, 1]$

Every Cover of a Compact Real Interval by Open Intervals Has a Finite Subcover where only Consecutive Sets Overlap?

Vector Space: is there a general definition of annihilator beyond the dual space?

Is There a Common Definition of "Finite Support"?

Dense Subspaces and Orthonormal Bases.

Operators and Tensor Products

A Finite Dimensional non-Unitary Isometry?

A Homeomorphism is a Bijection between the Underlying Sets and between the Corresponding Topologies?

Understanding the Core of an Operator or Map.

Some Questions about Regulated Functions

Reparameterisation of Curve as a Regular Curve (Topology)

Understanding Direct Sums and Product (Vector Spaces)

History: Direct Product became Tensor Product?

Is an Infinite Dimensional Inner Product Space Isomorphic to its Continuous Dual Space?

For a Vector Space $V = A \oplus B = A \oplus C \implies \dim(B) = \dim(C) $?

Quantum Mechanics: position and the separability of Hilbert space?

An Algebraic Proof that $|y^3 - x^3| \ge |(y - x)|^3/4 $

Is a Linear Transformation a Vector Space Homomorphism?

Is this a Correct Proof of the Principle of Complete Induction for Natural Numbers in ZF?

Why is the measure of the reals not zero?

Linear Independence of Pre-Image

Example for $\text {End}(V \otimes W) $ not isomorphic to $\text{End}(V) \otimes \text{End}(W)$