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 AtlasVerification · atlas · labRuns in your browser · nothing uploaded
After the run, before the claim
Did your fine-tune actually help?
Bring paired baseline and variant scores plus matched rerun metrics. Continuous Function describes the item-level difference, checks whether it repeats across the runs you provide, and surfaces the design risks those numbers cannot settle. Leave with a bounded reading of the submitted evidence.
Verify a run
Browser-local · nothing uploaded, saved, or exported
- 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, or account; some browser-local predictions can be saved for your return.
Enter the LabWhat is not yet known
Follow an open question
Research questions shown with what may be said now, what remains unresolved, and which evidence could move the boundary.
Browse research questionsWorked 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