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• CommentRowNumber1.
• CommentAuthorJohn Baez
• CommentTimeJun 5th 2021

Pointed out that the ring of big Witt vectors is represented by the free lambda-ring on one generator (no coincidence; this follows by easy abstract nonsense).

1. typo

Yun

2. typo

Yun

• CommentRowNumber4.
• CommentAuthorJohn Baez
• CommentTimeJul 30th 2022

I changed

If $A$ is a perfect field then $W(A)$ is a discrete valuation.

to

If $A$ is a perfect field then $W(A)$ is a discrete valuation ring.

since I don’t think the former even parses.

• CommentRowNumber5.
• CommentAuthorDavidRoberts
• CommentTimeJul 30th 2022