Description: Deduction joining nested implications to form implication of conjunctions. (Contributed by NM, 29-Feb-1996)
Ref | Expression | ||
---|---|---|---|
Hypotheses | im2an9.1 | |
|
im2an9.2 | |
||
Assertion | im2anan9 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | im2an9.1 | |
|
2 | im2an9.2 | |
|
3 | 1 | adantrd | |
4 | 2 | adantld | |
5 | 3 4 | anim12ii | |