Stack Exchange Network

Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange
Loading…
  1. 0
  2. +0
    • Tour Start here for a quick overview of the site
    • Help Center Detailed answers to any questions you might have
    • Meta Discuss the workings and policies of this site
    • About Us Learn more about Stack Overflow the company
    • Business Learn more about hiring developers or posting ads with us
  3. Log in Sign up
  4. current community

    • Mathematics
      help chat
    • Mathematics Meta

    your communities

    Sign up or log in to customize your list.

    more stack exchange communities

    company blog
Mathematics
  1. Home
    1. Questions
    2. Tags
    3. Users
    4. Unanswered
Profile Activity
Meta user
Network profile
Luke Collins

Reputation

7,620
  • 7.6k
  • 4.1k
  • 630
  • 2018
  • 2019
  • 2020
  • 2021

Top tag

calculus

Next privilege

10,000 Rep.
Access moderator tools

Badges

1
12
35

Newest

 Popular Question

Next badge

74/100
Socratic

Impact

~64k
people reached
98 posts edited
5 helpful flags
214 votes cast
Summary Answers Questions Tags Badges Bookmarks Bounties Reputation All actions

99 Questions

Votes Activity Newest Views
7
19
votes
2
answers
1k
views

Is Pythagoras' Theorem a theorem?

geometry foundations
Mar 3 '20 at 21:32 Dr. Michael W. Ecker 163
 
12
votes
2
answers
2k
views

Notation: Is $(\Delta x)^2 = \Delta x^2$?

notation
Jan 10 '16 at 19:57 Mankind 12.3k
2
8
votes
4
answers
1k
views

Coefficients of the characteristic polynomial

linear-algebra matrices determinant
Jun 25 '19 at 22:09 J.G 4,329
 
7
votes
3
answers
163
views

Examples of functions with a removable discontinuity

calculus algebra-precalculus education
Dec 17 at 21:53 Don Thousand 11.3k
2
7
votes
5
answers
618
views

Better proof for $\frac{1+\cos x + \sin x}{1 - \cos x + \sin x} \equiv \frac{1+\cos x}{\sin x}$

trigonometry alternative-proof
Feb 23 '20 at 20:38 Luke Collins 7,620
2
7
votes
4
answers
298
views

Defining the Cosine Function from First Principles, intuitively

real-analysis geometry trigonometry
Jan 8 '19 at 3:56 David K 75.4k
2
7
votes
2
answers
5k
views

What is a homogeneous Differential Equation?

ordinary-differential-equations
Jan 28 '18 at 6:42 Community♦ 1
1
6
votes
1
answer
101
views

Is “lines remain lines” sufficient to characterise linearity in $\mathbb R^2$?

linear-algebra vector-spaces linear-transformations
Jan 15 at 1:03 Tesla Daybreak 578
2
6
votes
2
answers
675
views

In a ring, are cosets always additive?

abstract-algebra ring-theory
May 31 '17 at 23:35 Trevor Gunn 22.6k
2
4
votes
2
answers
182
views

“Old-Fashioned” O-level Maths Book

algebra-precalculus reference-request soft-question education book-recommendation
Jan 21 at 20:36 A-Level Student 4,118
2
4
votes
1
answer
88
views

Is it possible to express this sum in a closed form?

summation closed-form
Dec 3 '19 at 0:35 Luke Collins 7,620
3
4
votes
3
answers
141
views

Prove Nice Determinant Equations [duplicate]

linear-algebra matrices determinant
Dec 30 '18 at 10:38 Daniele Tampieri 6,709
 
4
votes
2
answers
373
views

Pattern in Isomorphisms between $\mathbb Z_m \times \mathbb Z_n$ and $\mathbb Z_{mn}$

group-theory prime-numbers direct-product
Nov 27 '17 at 23:52 lhf 200k
 
4
votes
2
answers
541
views

I know that any two left/right cosets are either equal or disjoint, but what about the sets of cosets?

group-theory
Nov 25 '17 at 16:20 G Tony Jacobs 28.6k
1
4
votes
1
answer
1k
views

Why does this prove that a curve is a straight line?

geometry differential-geometry proof-verification curvature
Jan 23 '17 at 16:28 Ted Shifrin 88.9k
 
3
votes
3
answers
63
views

Projection of linear combination of real numbers

calculus linear-algebra abstract-algebra number-theory elementary-number-theory
Dec 11 at 19:20 Raffaele 25.3k
1
3
votes
0
answers
75
views

Has anyone ever studied “triangular” equations?

algebra-precalculus soft-question recreational-mathematics triangular-numbers
Nov 30 at 22:16 J. W. Tanner 54.4k
 
3
votes
1
answer
56
views

Does a bounded well-ordered set have a maximum?

elementary-set-theory order-theory well-orders
Nov 21 at 10:29 Asaf Karagila♦ 350k
1
3
votes
3
answers
86
views

Polynomials such that $f_n(x+y, xy) = x^n + y^n$.

algebra-precalculus polynomials
Oct 30 at 0:54 Argon 23.4k
1
3
votes
1
answer
879
views

What is an exact differential equation?

ordinary-differential-equations
Aug 19 at 6:04 Community♦ 1
 
3
votes
2
answers
117
views

Is this proof that $\mathbb Q(\sqrt[4]{-5})/\mathbb Q$ is not normal correct?

abstract-algebra proof-verification galois-theory
Nov 16 '19 at 13:27 nguyen quang do 12.3k
 
3
votes
0
answers
114
views

Recursion-like sequences which are hard to relate recursively

discrete-mathematics induction recurrence-relations
May 11 '19 at 13:06 Luke Collins 7,620
2
3
votes
1
answer
3k
views

Classify all groups of order 75 [duplicate]

group-theory sylow-theory
Jan 28 '18 at 20:30 Dietrich Burde 106k
 
3
votes
1
answer
45
views

A Convention of Set Builder Notation

elementary-set-theory
Jan 13 '18 at 13:27 Asaf Karagila♦ 350k
1
3
votes
1
answer
289
views

Proof that an abelian group whose action has one orbit has a singleton stabiliser.

group-theory permutations
Nov 15 '17 at 19:49 James 8,442
 
3
votes
1
answer
94
views

Notation: Relabelling elements of a (finite) set

combinatorics notation
Nov 13 '17 at 8:02 Eike Schulte 1,131
 
3
votes
2
answers
3k
views

Is the multiplicative identity unique in a unit ring?

ring-theory
May 29 '17 at 23:57 rschwieb 131k
1
3
votes
1
answer
104
views

Number of ways of Sitting at Two tables

probability combinatorics combinations
Apr 13 '17 at 14:21 drhab 134k
 
3
votes
1
answer
392
views

How is this Taylor's Theorem?

calculus analysis taylor-expansion
Mar 9 '17 at 0:37 quantumkid 216
 
3
votes
1
answer
680
views

Proving that a limit of a piecewise constant function does not exist using $\epsilon$-$\delta$

real-analysis limits epsilon-delta
Dec 6 '16 at 22:58 ervx 11.6k
1
2 3 4 Next
Mathematics
  • Tour
  • Help
  • Chat
  • Contact
  • Feedback
  • Mobile
Company
  • Stack Overflow
  • For Teams
  • Advertise With Us
  • Hire a Developer
  • Developer Jobs
  • About
  • Press
  • Legal
  • Privacy Policy
  • Terms of Service
Stack Exchange
Network
  • Technology
  • Life / Arts
  • Culture / Recreation
  • Science
  • Other
  • Stack Overflow
  • Server Fault
  • Super User
  • Web Applications
  • Ask Ubuntu
  • Webmasters
  • Game Development
  • TeX - LaTeX
  • Software Engineering
  • Unix & Linux
  • Ask Different (Apple)
  • WordPress Development
  • Geographic Information Systems
  • Electrical Engineering
  • Android Enthusiasts
  • Information Security
  • Database Administrators
  • Drupal Answers
  • SharePoint
  • User Experience
  • Mathematica
  • Salesforce
  • ExpressionEngine® Answers
  • Stack Overflow em Português
  • Blender
  • Network Engineering
  • Cryptography
  • Code Review
  • Magento
  • Software Recommendations
  • Signal Processing
  • Emacs
  • Raspberry Pi
  • Stack Overflow на русском
  • Code Golf
  • Stack Overflow en español
  • Ethereum
  • Data Science
  • Arduino
  • Bitcoin
  • Software Quality Assurance & Testing
  • Sound Design
  • Windows Phone
  • more (28)
  • Photography
  • Science Fiction & Fantasy
  • Graphic Design
  • Movies & TV
  • Music: Practice & Theory
  • Worldbuilding
  • Video Production
  • Seasoned Advice (cooking)
  • Home Improvement
  • Personal Finance & Money
  • Academia
  • Law
  • Physical Fitness
  • Gardening & Landscaping
  • Parenting
  • more (10)
  • English Language & Usage
  • Skeptics
  • Mi Yodeya (Judaism)
  • Travel
  • Christianity
  • English Language Learners
  • Japanese Language
  • Chinese Language
  • French Language
  • German Language
  • Biblical Hermeneutics
  • History
  • Spanish Language
  • Islam
  • Русский язык
  • Russian Language
  • Arqade (gaming)
  • Bicycles
  • Role-playing Games
  • Anime & Manga
  • Puzzling
  • Motor Vehicle Maintenance & Repair
  • Board & Card Games
  • Bricks
  • Homebrewing
  • Martial Arts
  • The Great Outdoors
  • Poker
  • Chess
  • Sports
  • more (16)
  • MathOverflow
  • Mathematics
  • Cross Validated (stats)
  • Theoretical Computer Science
  • Physics
  • Chemistry
  • Biology
  • Computer Science
  • Philosophy
  • Linguistics
  • Psychology & Neuroscience
  • Computational Science
  • more (10)
  • Meta Stack Exchange
  • Stack Apps
  • API
  • Data
  • Blog
  • Facebook
  • Twitter
  • LinkedIn
  • Instagram

site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. rev 2021.2.26.38670