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• Source-character-set

Basic-source-charp

Recognize the basic source characters.

These are the characters in the image of the injection from the ASCII characters.

Definitions and Theorems

Theorem: basic-source-charp-suff

(defthm basic-source-charp-suff
  (implies (and (ascii-basic-source-charp ascii)
                (equal x (ascii-to-source-char ascii)))
           (basic-source-charp x)))

Theorem: booleanp-of-basic-source-charp

(defthm booleanp-of-basic-source-charp
  (b* ((yes/no (basic-source-charp x)))
    (booleanp yes/no))
  :rule-classes :rewrite)

Theorem: source-charp-when-basic-source-charp

(defthm source-charp-when-basic-source-charp
  (implies (basic-source-charp x)
           (source-charp x)))