Jay Cummings ✓

@LongFormMath · Sacramento, CA · joined 22 Jul 2019

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).

51 894Followers

599Following

6 969Posts total

451.3KViews on collected posts

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Jay Cummings ✓@LongFormMath18 Sep

https://t.co/PPgJajOmKT

17.8K views · 545 likes · 31 reposts · 5 replies Open on X →

Jay Cummings ✓@LongFormMath18 Sep

Don’t pick Newton. As a professor at Cambridge he was required to give periodic lectures but he was so bad at it that often not a single person would show up. (Being a man of honor, he would lecture anyways—to an empty room.) 126.8K views · 2.7K likes · 60 reposts · 64 replies Open on X →

Jay Cummings ✓@LongFormMath16 Sep

Watching AI agents have all the fun https://t.co/UxPYsCKVlK

25.6K views · 519 likes · 19 reposts · 4 replies Open on X →

Jay Cummings ✓@LongFormMath16 Sep

Around 12 years ago I asked Ron Graham who he thought was the greatest living mathematician. He said, "Well most people would say Tao, and he very well might be, but I'll say Serre." 33.1K views · 617 likes · 36 reposts · 9 replies Open on X →

Jay Cummings ✓@LongFormMath16 Sep

The Bernoullis were more than a family of mathematicians; they formed a remarkable mathematical dynasty. Across several generations, Jacob, Johann, Daniel, and others made important contributions to mathematics and mathematical physics during the 17th and 18th centuries, https:

35.4K views · 391 likes · 85 reposts · 5 replies Open on X →

Jay Cummings ✓@LongFormMath22 Apr 2025

🧵 My 3rd book is now out! It is on the fascinating history of math. How did people throughout history think about math?What problems did they care about? How did they express them? How were they solved? This book includes a lot of historical math. https://t.co/WQ3RRI6J4T 212.6K views · 795 likes · 113 reposts · 47 replies Open on X →

เทียบกับบัญชีขนาดเดียวกัน

5 โพสต์จาก 90 วันที่ผ่านมา เทียบกับช่วง 10K–100K ผู้ติดตาม แสดงไปไกลเกินผู้ติดตามของตัวเอง และผู้ชมก็ตอบสนอง.

ยอดดูมัธยฐาน33 068บัญชีนี้997ค่ามัธยฐานของ 10K–100K

การเข้าถึง, %63.72%บัญชีนี้3.84%ค่ามัธยฐานของ 10K–100K

การมีส่วนร่วม, %2.12%บัญชีนี้1.52%ค่ามัธยฐานของ 10K–100K

ตัวชี้วัด	บัญชีนี้	ค่ามัธยฐานของ 10K–100K	อัตราส่วน
ยอดดูมัธยฐานต่อโพสต์	33 068	997	33.2×
การเข้าถึง (ยอดดู ÷ ผู้ติดตาม)	63.72%	3.84%	16.6×
อัตราการมีส่วนร่วม	2.12%	1.52%	1.40×

บัญชีอื่นในช่วงนี้ → เปรียบเทียบกับบัญชีอื่น → ค่าอ้างอิงเหล่านี้คำนวณอย่างไร →

Growth & engagement

How the posts we collected actually performed: views and reaction rate post by post, what the audience did with them, and where the follower count goes.

Views per post

212.6K22 Apr

35.4K16 Sep

33.1K

25.6K

126.8K18 Sep

17.8K

Last 6 collected posts, oldest on the left. The scale is logarithmic: one post can outrun the rest a hundred times over.

Engagement rate per post

0.45%22 Apr

1.39%16 Sep

2.00%

2.12%

2.25%18 Sep

3.27%

Reactions — likes, reposts, replies and quotes — divided by views. Median for 10K–100K accounts is 1.52%.

What the audience does

Likes76.7%5 582 in total

Reposts4.7%344 in total

Replies1.8%134 in total

Quotes0.4%30 in total

Bookmarks16.4%1 192 in total

Share of every reaction we collected for this account. Replies mean argument, reposts mean endorsement, bookmarks mean the post was worth keeping.

The follower curve appears once this account has two daily snapshots — we take one a day, and this one is on its first.

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เทียบกับบัญชีขนาดเดียวกัน

Growth & engagement

Views per post

Engagement rate per post

What the audience does

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