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README.md

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+Note: this repo is a WIP and does not yet implement all features described below. It is certainly not ready to be used to train a model. 
+# Dataset card for the proof-pile
+The `proof-pile` is a 45GB pre-training dataset of mathematical text. The dataset is composed of diverse sources of both informal and formal mathematics, namely
+- ArXiv.math (40GB)
+- Open-source math textbooks (50MB)
+- Formal mathematics libraries (500MB)
+    - Lean mathlib and other Lean repositories 
+    - Isabelle AFP
+    - Coq mathematical components and other Coq repositories 
+    - HOL Light
+    - set.mm
+    - Mizar Mathematical Library
+- Math Overflow and Math Stack Exchange (500MB)
+- Wiki-style sources (50MB)
+  - ProofWiki
+  - Wikipedia math articles
+- MATH dataset (6MB)