Algebra Etc. @AlgebraFact
Tweets about algebra, number theory, and miscellaneous math by @JohnDCook. JohnDCook.com Joined January 2010-
Tweets14K
-
Followers194K
-
Following19
-
Likes201
'It is the snobbishness of the young to suppose that a theorem is trivial because the proof is trivial.' -- Henry Whitehead
0
10
63
4K
8
New post: Mandelbrot points of every period johndcook.com/blog/2025/09/0…
Initial objects and final objects johndcook.com/blog/initial-f…
If A is a subset of a group G, the centralizer of A is the set of elements in G that commute with everything in A.
New post: Minimalist Mandelbrot Set johndcook.com/blog/2025/09/0…
Let G be a finitely generated group and H a subgroup of G. H may require more generators than G.
Yes, that De Morgan. x.com/johndcook/stat…
Algebra Etc. retweeted
Category theory without categories johndcook.com/blog/2023/05/2…
There is no triangle with rational sides and rational area in which one side is twice as long as another.
(AB)C = A(BC) for matrices. But one side of the equation might be much more efficient to compute than the other.
The cross products of three vectors satisfy a × (b × c) + b × (c × a) + c × (a × b) = 0.
For every positive rational number r there exists a triangle with rational sides and area r.
Let R be a UFD (unique factorization domain). Then R[x] is a UFD.
Stacking positive and negative cannonballs johndcook.com/blog/2025/05/3…
Alien astronomers and Benford's law johndcook.com/blog/2023/03/0…
False Witnesses johndcook.com/blog/2025/06/0…
Analysis Fact @AnalysisFact
133K Followers 19 Following Daily tweets about real and complex analysis and related topics. From @JohnDCook.
Jay Cummings @LongFormMath
44K Followers 598 Following Math prof. Author of long-form textbooks on proofs (https://t.co/YqXnxDmOe0), real analysis (https://t.co/3IGQ6BIx5Z) & math history (https://t.co/KkXMGTxCDK).
the finite physicist @FinitePhysicist
69K Followers 356 Following theoretical particle physics & phenomenology || don't sleep through dreams that can come true
Steven Strogatz @stevenstrogatz
164K Followers 3K Following Mathematician, writer, Cornell professor. All cards on the table, face up, all the time.
Martin Bauer @martinmbauer
91K Followers 1K Following Working on particle physics, quantum sensors, dark matter. Associate Prof at @IPPP_Durham @durham_uni, FLF @UKRI_News, Science board member @STFC_Matters
Topology Fact @TopologyFact
74K Followers 19 Following Tweets on topology and geometry from @JohnDCook.
Computer Science @CompSciFact
251K Followers 19 Following Daily tweets about computer science and related stuff @JohnDCook.
MathType @MathType
46K Followers 280 Following Type and handwrite mathematical notation. Easily include quality math equations in your documents and digital content. Part of @wiris_science.
Matt Henderson @matthen2
80K Followers 3K Following maths, visualisations, conversational AI. VP Research @polyaivoice prev: @RekaAILabs, @Apple AI/ML, @GoogleAI, PhD @Cambridge_Eng
Differential Eqns @diff_eq
75K Followers 17 Following Tweets on ordinary and partial differential equations from @JohnDCook
Data Science Fact @DataSciFact
195K Followers 19 Following Daily data science tweets from @JohnDCook.
Frank Nielsen @FrnkNlsn
36K Followers 2K Following Information Geometry, Information Theory, and Geometric Science of Information (GSI) for machine learning and AI, visual computing, HPC, pyBregMan lib @SonyCSL
Sam Walters ☕️ @SamuelGWalters
14K Followers 482 Following 🇨🇦 Math prof. Former Chair of Math-Stat Dept at the University of Northern B.C. (Mar 2016 - Jun 2020). Christian.
Alex Kontorovich @AlexKontorovich
29K Followers 806 Following Mathematician (Distinguished Professor of #Math at @RutgersU). Here to learn about research, education, and community. Let’s build something together.
Signal Processing @DSP_fact
34K Followers 18 Following Digital signal processing, acoustics, Fourier analysis, etc.
Scientific Python @SciPyTip
209K Followers 18 Following Tweets about SciPy (Scientific Python) and related topics from @JohnDCook.
Dave Richeson @divbyzero
26K Followers 1K Following Mathematician. Curley Chair in Liberal Arts at Dickinson College. Author of Tales of Impossibility and Euler's Gem. Now: https://t.co/cefdX8CG6u
David Concha @DAECA12
160 Followers 2K Following Did you say it? I love you, I don't ever live without you - Licenciado en Física con mención en Astronomía, UV - Magíster en Astrofísica, UV - PhD Candidate UDA
DrStormyData📈 @NormEbsary
2K Followers 6K Following Data/Math/Ai 🧠Heavy Metal🏋️/Swim🏊♂️Run🏃🏼♂️Enthusiast Finance/Economy/Business 💰❤️🇺🇸 ❤️🦮❤️ 🎼❤️🏈❤️🥑. 🙉No DM👹No Porn😈 Pls🙏
I don’t have a name... @Drago2191
8 Followers 2K Following
SHUBHAM MAHESHWARI @svml007
1 Followers 184 Following
⚡︎⚡︎igmund Lo... @LoyFact
3K Followers 4K Following I post in EN/TH so don't get freaked |GOAL: To be great pioneer, uni is just side quest.| Passion in AI, Economic, Finance and Defensive Engineering.|ENTP-A 5w4
Albert @Fluid_Albert
0 Followers 6 Following
Mucus Lader @mucuslader
95 Followers 4K Following
mumu Wang @mumuwang0427
25 Followers 403 Following
IT'S HARRY @harsh0goswami
0 Followers 62 Following
Ipazia Da Alessandria @IpaziaDaAlessan
50 Followers 376 Following
Chips Lover @ChipsEden34918
275 Followers 7K Following
Engin Soba Ressurecti... @SobaEngin
98 Followers 1K Following Bilkent Sosyoloji ve Toplum Mühendisliği Ölüm geldiğine mal da gider mülk de gider, eş gider dost gider ama iman kabre bizimle beraber girer… certified coconut
Duke of Busitema Univ... @Anthony94628150
93 Followers 1K Following Web developer with a passion for building responsive, scalable, and maintainable web applications using React,node.js, Python, typescript, CSS and more
chengjilai @chengjilai
17 Followers 736 Following
Algebraist @Algebraist30418
0 Followers 54 Following
ROBERT dila @ROBERTdila1
0 Followers 48 Following
Jay Tee @jaytee453
2 Followers 73 Following
keter @keter3250
10 Followers 163 Following
Abdikani Muhumed @Abdikani83
153 Followers 677 Following Health & Wellness Enthusiast,🥗 Daily Motivation💪 & World History.🌍
Edmund Yap @eyapkw
1 Followers 170 Following
Pedro Custódio @pedro_cust52813
53 Followers 367 Following
cccccttttt @cccccttttt12345
0 Followers 68 Following
Abdulrahman Kaura @Abdulkaura007
13 Followers 694 Following a software developer/data scientist passionate about anything tech and Artificial intelligence .
onlyfansdilf @onlyfansdilf
0 Followers 37 Following
AstutaVulpes @AstutaVulpes
11 Followers 251 Following
delaney @DelaneyDvorsky
4 Followers 48 Following
koshalya bareth @Koshalyabareth
7 Followers 446 Following
Bryanne Urban @SpaceyMiragee
1 Followers 42 Following
Wallpeflower @Shank273
137 Followers 2K Following Part-time scroller, full-time thinker — a curious mind riding the X wave, absorbing everything from tech trends to brain bends. Equal parts silicon and soul
███████... @transmissionem
1 Followers 942 Following
farid @faridsinaei
5 Followers 52 Following
Analysis Fact @AnalysisFact
133K Followers 19 Following Daily tweets about real and complex analysis and related topics. From @JohnDCook.
Topology Fact @TopologyFact
74K Followers 19 Following Tweets on topology and geometry from @JohnDCook.
Computer Science @CompSciFact
251K Followers 19 Following Daily tweets about computer science and related stuff @JohnDCook.
Differential Eqns @diff_eq
75K Followers 17 Following Tweets on ordinary and partial differential equations from @JohnDCook
Data Science Fact @DataSciFact
195K Followers 19 Following Daily data science tweets from @JohnDCook.
Signal Processing @DSP_fact
34K Followers 18 Following Digital signal processing, acoustics, Fourier analysis, etc.
Scientific Python @SciPyTip
209K Followers 18 Following Tweets about SciPy (Scientific Python) and related topics from @JohnDCook.
TeX and Typography @TeXtip
51K Followers 19 Following Tweets on TeX, LaTeX, and typography. @JohnDCook.
Unix tool tip @UnixToolTip
84K Followers 19 Following Tips on Unix utilities and related topics from @JohnDCook.
Functor Fact @FunctorFact
26K Followers 6 Following Functional programming and category theory tweets from @JohnDCook
Science and Medicine @ScienceTip
42K Followers 19 Following Daily post on science and medicine from @JohnDCook
Science Banana @literalbanana
18K Followers 642 Following director of science programming for the Abstract Noun Abuse Prevention Task Force, a project of the Union of Concerned Anthropomorphic Fruit
Medical Vocabulary @MedVocab
52K Followers 19 Following Learn medical vocabulary a little bit at a time. From @JohnDCook.
Units @UnitFact
25K Followers 17 Following Units of measurement, constants, dimensional analysis, etc. From @JohnDCook
Network Fact @NetworkFact
47K Followers 19 Following Daily tweets about networks, graph theory, and related topics from @JohnDCook
Regular Expression @RegexTip
75K Followers 19 Following Learn to use regular expressions by following RegexTip. From @JohnDCook.Trends for United States
29,6 B posts
8.629 posts
27,5 B posts
235 B posts
24,9 B posts
4.209 posts
5.478 posts
4.016 posts
7.237 posts
1.017 posts
1.585 posts
1.600 posts
3.163 posts
2.680 posts
14,8 B posts
2.844 posts
You might like
Analysis Fact
@AnalysisFact
133K Followers
Probability Fact
@ProbFact
147K Followers
Differential Eqns
@diff_eq
75K Followers
Topology Fact
@TopologyFact
74K Followers
Data Science Fact
@DataSciFact
195K Followers
Grant Sanderson
@3blue1brown
411K Followers
Logic & Applications
@LogicPractice
27K Followers
Computer Science
@CompSciFact
251K Followers
Maths History
@mathshistory
109K Followers
Scientific Python
@SciPyTip
209K Followers
Republic of Mathemati...
@republicofmath
160K Followers
Science and Medicine
@ScienceTip
42K Followers
Steven Strogatz
@stevenstrogatz
164K Followers
Functor Fact
@FunctorFact
26K Followers
MathType
@MathType
46K Followers