What is known
Read the atlas
Fifty-one concept notes with intuition, mathematics, code, and a runnable figure, over the foundations they depend on.
Open the AtlasAtlas · notebook · labPublic preview · one investigation open
Mathematical atlas · notebook · lab
Bring one AI idea. Leave with a model you can test.
Start with a concept, equation, mechanism, paper question, or model behavior. Follow the same object through intuition, math, code, an experiment, and an honest source boundary.
- Object
- Prerequisite
- Prediction
- Witness
- Evidence
- Invariant
- Next move
What you can test
Commit to a prediction
Investigations that take your answer before showing the calculation. No score, streak, account, or saved answer.
Enter the LabWhat is not yet known
Follow an open question
Research programs published by claim boundary and evidence state — including a result that reproduced and still meant something else.
Read the Atlas-64 reportWorked example · Transformer systems
What gets smaller when four query heads share one memory?
One worked example from the wider atlas. Predict the memory effect, inspect the calculation, then connect the result backward to attention and forward to serving.
Attention head sharing
One mechanism, still sealed
Thirty-two query heads enter a sealed head-sharing comparison. The changed quantity and calculated result are not shown.
- Head diagram
- Equation
- Code
- Calculated result
The evaluated count and memory stay sealed until you lock in a guess or choose Just show me.
Test this worked example
About two minutes · saved in this browser only if you lock in a prediction
The rule every notebook follows
One idea, carried through four representations.
Curated routes
Follow a question, not a catalog.
Foundations First
Build the mathematical language needed for modern model training.
Transformer Systems
Move from attention mechanics to long-context inference decisions.
Frontier Notebooks
Use the foundations to inspect generation, alignment, and representations.
51 published notebooks