Support Lemma
Mathematics belongs to everyone.
Lemma is free — and we'd like to keep it that way. If it has given you a good problem to think about over coffee, consider helping us curate more beautiful problems, keep the servers humming, and support the people who contribute.
$5 / month
Friend of Lemma
- Keep the library free
- Our quiet gratitude
$10 / month
Supporter
- Everything in Friend
- A Founding Member badge
- Early access to new collections
$25 / month
Mathematical Patron
- Everything in Supporter
- Named in the Founding Members
- Help commission new problems
Founding Members
Be part of the story.
The first people who help build a home for mathematical thinkers will be remembered as its Founding Members — the ones who believed a quiet library for mathematics was worth making.
Contributions open soon. Until then, the best support is to solve a problem and share your thinking.