Support Lemmas

Lemmas is free to use. If you would like to help, a donation goes toward what it costs to keep the site running: hosting, the database and the domain.

Where the money goes

Donations pay for running Lemmas first. All extra proceeds, every dollar beyond those costs, will be donated to a charity or nonprofit that supports math for kids.

How to give

Write to lemmas.official@gmail.com and we will send you a way to give.

Giving is optional and never changes what you can do on Lemmas. Lemmas is not a registered nonprofit, so donations are not tax deductible. Questions about where the money goes are welcome at the same address.