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    • Rename

    Ident-ident-subst

    Signature
    (ident-ident-subst ident alist) → new-ident
    Arguments
    ident — Guard (identp ident).
    alist — Guard (ident-ident-alistp alist).
    Returns
    new-ident — Type (identp new-ident).

    Definitions and Theorems

    Function: ident-ident-subst

    (defun ident-ident-subst (ident alist)
      (declare (xargs :guard (and (identp ident)
                                  (ident-ident-alistp alist))))
      (let ((__function__ 'ident-ident-subst))
        (declare (ignorable __function__))
        (b* ((lookup (assoc-equal (ident-fix ident)
                                  (ident-ident-alist-fix alist))))
          (ident-fix (if lookup (cdr lookup) ident)))))

    Theorem: identp-of-ident-ident-subst

    (defthm identp-of-ident-ident-subst
      (b* ((new-ident (ident-ident-subst ident alist)))
        (identp new-ident))
      :rule-classes :rewrite)

    Theorem: ident-ident-subst-of-ident-fix-ident

    (defthm ident-ident-subst-of-ident-fix-ident
      (equal (ident-ident-subst (ident-fix ident)
                                alist)
             (ident-ident-subst ident alist)))

    Theorem: ident-ident-subst-ident-equiv-congruence-on-ident

    (defthm ident-ident-subst-ident-equiv-congruence-on-ident
      (implies (c$::ident-equiv ident ident-equiv)
               (equal (ident-ident-subst ident alist)
                      (ident-ident-subst ident-equiv alist)))
      :rule-classes :congruence)

    Theorem: ident-ident-subst-of-ident-ident-alist-fix-alist

    (defthm ident-ident-subst-of-ident-ident-alist-fix-alist
      (equal (ident-ident-subst ident (ident-ident-alist-fix alist))
             (ident-ident-subst ident alist)))

    Theorem: ident-ident-subst-ident-ident-alist-equiv-congruence-on-alist

    (defthm
          ident-ident-subst-ident-ident-alist-equiv-congruence-on-alist
      (implies (ident-ident-alist-equiv alist alist-equiv)
               (equal (ident-ident-subst ident alist)
                      (ident-ident-subst ident alist-equiv)))
      :rule-classes :congruence)