Pricing
Units 1–13 are free for everyone. Units 14–20, the maths of modern AI, are paid — once, and then they are yours.
One unit
Any one of Units 14–20.
All seven units
Units 14–20 together, for about the price of three.
To buy, open any of Units 14–20 below and unlock it from its free preview.
What the paid units cover
- Unit 14Thinking in Probabilities
- Unit 15The Network, Whole
- Unit 16Words as Vectors
- Unit 17Machines with Memory
- Unit 18Attention and Transformers
- Unit 19The Maths Inside an LLM
- Unit 20From Noise to Pictures: VAEs and Diffusion
One payment, yours to keep
No subscription, no renewal and no auto-debit. Access to a unit you buy does not expire, and future updates to that unit are included.
You never pay more than ₹999 in total
Buy units one at a time if you like. Once your purchases reach ₹999, all seven unlock.
How to pay
UPI, debit or credit card, netbanking, or a wallet — processed securely by Razorpay. We never see or store your card or bank details.
Good to know
Prices are in Indian rupees and include all taxes. Every paid unit starts with a free preview, so you can see the style before you buy. If it isn't for you, you can ask for a full refund within 7 days — see the Cancellation & Refund Policy.
Teachers and institutions
Write to sbh.mech@gmail.com for class access.
Units 1–13 cover the mathematics every machine-learning model stands on: linear systems, vector spaces, geometry, eigenvalues, SVD, calculus, backpropagation, Taylor series, gradient descent, optimisation, PCA and SVMs. Start with Unit 1 — no sign-up needed.