rep_thm: 'der' field has additional bool for oracles;

minor corrections

isa: do not touch_all_thys on startup;

coercion "intify" to remove type constraints from integer algebraic laws

tidying and speeding up proofs

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used natify with div and mod; also put in the divide-by-zero trick

natify, a coercion to reduce the number of type constraints in arithmetic

tuned msg;

* blast(_tac) now handles actual object-logic rules as assumptions; note that auto(_tac) uses blast(_tac) internally, too; tuned;

added all_eq, imp_eq (for blast);

improved comments; added all_eq, imp_eq (for blast); basic calculational rules;

handle actual object-logic rules by atomizing the goal;

added atomize_goal / atomize_tac;

(un)fold: CHANGED; added atomize_tac;

added has_meta_prems;

tuned;

tuned;

updated 'obtain';

Removed Quot

Never used and not relevant.

obtain;

added split_bind_asm, bind_splits;