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Universal Derivation

Using universal derivation (ud)

From  Brian Rabern 0 likes 296 plays 0  

Introducing L3 derivations

Talking through problem 3:5 introducing the quantifier inference rules.

From  Brian Rabern 0 likes 498 plays 0  

De Morgan's Law T63

A derivation of a theorem for the derived rule dm.

From  Brian Rabern 2 likes 613 plays 0  

Assumptions for conditional derivation

A look at Week 3 exercise 1:18 and the multiple assumptions and show lines involved.

From  Brian Rabern 1 likes 715 plays 0  

Derivation dub

doing some derivations for fun

From  Brian Rabern 2 likes 574 plays 0