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Letter-chars

A character set for letter-char-p.

Function: letter-chars$inline

(defun letter-chars$inline nil
  (declare (xargs :guard t))
  10633823810298881996379053697534001152)

Theorem: charset-p-of-letter-chars

(defthm charset-p-of-letter-chars
  (charset-p (letter-chars)))

Theorem: char-in-charset-p-of-letter-chars

(defthm char-in-charset-p-of-letter-chars
  (equal (char-in-charset-p x (letter-chars))
         (letter-char-p x)))