Knots Knotes
Knots Knotes by Justin Robertsby Justin Roberts
Shares rank 7 of 20 mathematics textbooks by recommenders
A conversational introduction to knots and algebraic topology with many pictures, praised as a fabulous and wonderful set of notes.
A conversational introduction to knots and algebraic topology with many pictures, praised as a fabulous and wonderful set of notes.
4 people gave an opinion
- recommend it
- 4
- criticize it
- 0
- approval share
- 100%
Recommended in 1 of 13 months
- November 2025: not recommended
- December 2025: not recommended
- January 2026: not recommended
- February 2026: not recommended
- March 2026: recommended
- April 2026: not recommended
- May 2026: not recommended
- June 2026: not recommended
- July 2026: not recommended
- August 2026: not recommended
- September 2026: not recommended
- October 2026: not recommended
- November 2026: not recommended (month in progress)
Why it doesn’t carry the badge
- 4 people recommend itNeeds 10 or more, not met.
- Nobody criticizes itNeeds 2 to 1 or better, met.
- Recommended in 1 of 13 monthsNeeds 4 or more, not met.
The same three rules apply to every product, and the badge can’t be bought. How the badge works
What people say about it
The reasons people give, with the number of comments that give each one. Open a reason to read what they said.
Why people recommend it
Each mark is one comment
Conversational intro with many pictures
“a conversational intro to the subject with lots of pictures”
Comment from 9 Mar 2026 in “Algebraic topology: knots links and braids” Praised as a fabulous, wonderful set
“This set of notes is a fabulous document.”
Comment from 12 Mar 2026 in “Algebraic topology: knots links and braids” “That's a wonderful set of Knotes.”
Comment from 10 Mar 2026 in “Algebraic topology: knots links and braids” Revives feeling of first learning topology
“Reading these has sparked that feeling I had when I first got into topology.”
Comment from 10 Mar 2026 in “Algebraic topology: knots links and braids”
Other mathematics textbooks people recommend
The four most recommended other mathematics textbooks, with the same counts for each, so you can compare like for like. The tick on each bar marks the 2 to 1 line the badge needs.
| Product | Recommend | Criticize | Approval | Months | Owned | Badge |
|---|---|---|---|---|---|---|
| Algorithms for Optimizationby Kochenderfer and Wheeler | 10 | 1 | 91% | 1 | — | — |
| Mathematics for Computer Scienceby Lehman, Leighton and Meyer | 8 | 4 | 67% | 1 | — | — |
| Numerical Recipesby Press et al. | 7 | 1 | 88% | 5 | — | — |
| Concrete Mathematicsby Graham, Knuth and Patashnik | 7 | 0 | 100% | 4 | — | — |
| Knots Knotesby Justin RobertsThis page | 4 | 0 | 100% | 1 | — | — |
What people said
All 4 comments that mention it, newest first. Each links to the original comment.
“This set of notes is a fabulous document.”
“Reading these has sparked that feeling I had when I first got into topology.”
“That's a wonderful set of Knotes.”
“a conversational intro to the subject with lots of pictures”
Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.