Metamath Proof Explorer


Theorem xmullem

Description: Lemma for rexmul . (Contributed by Mario Carneiro, 20-Aug-2015)

Ref Expression
Assertion xmullem A * B * ¬ A = 0 B = 0 ¬ 0 < B A = +∞ B < 0 A = −∞ 0 < A B = +∞ A < 0 B = −∞ ¬ 0 < B A = −∞ B < 0 A = +∞ 0 < A B = −∞ A < 0 B = +∞ A

Proof

Step Hyp Ref Expression
1 ioran ¬ A = 0 B = 0 ¬ A = 0 ¬ B = 0
2 1 anbi2i A * B * ¬ A = 0 B = 0 A * B * ¬ A = 0 ¬ B = 0
3 ioran ¬ 0 < B A = +∞ B < 0 A = −∞ 0 < A B = +∞ A < 0 B = −∞ ¬ 0 < B A = +∞ B < 0 A = −∞ ¬ 0 < A B = +∞ A < 0 B = −∞
4 ioran ¬ 0 < B A = +∞ B < 0 A = −∞ ¬ 0 < B A = +∞ ¬ B < 0 A = −∞
5 ioran ¬ 0 < A B = +∞ A < 0 B = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞
6 4 5 anbi12i ¬ 0 < B A = +∞ B < 0 A = −∞ ¬ 0 < A B = +∞ A < 0 B = −∞ ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞
7 3 6 bitri ¬ 0 < B A = +∞ B < 0 A = −∞ 0 < A B = +∞ A < 0 B = −∞ ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞
8 ioran ¬ 0 < B A = −∞ B < 0 A = +∞ 0 < A B = −∞ A < 0 B = +∞ ¬ 0 < B A = −∞ B < 0 A = +∞ ¬ 0 < A B = −∞ A < 0 B = +∞
9 ioran ¬ 0 < B A = −∞ B < 0 A = +∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞
10 ioran ¬ 0 < A B = −∞ A < 0 B = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞
11 9 10 anbi12i ¬ 0 < B A = −∞ B < 0 A = +∞ ¬ 0 < A B = −∞ A < 0 B = +∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞
12 8 11 bitri ¬ 0 < B A = −∞ B < 0 A = +∞ 0 < A B = −∞ A < 0 B = +∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞
13 7 12 anbi12i ¬ 0 < B A = +∞ B < 0 A = −∞ 0 < A B = +∞ A < 0 B = −∞ ¬ 0 < B A = −∞ B < 0 A = +∞ 0 < A B = −∞ A < 0 B = +∞ ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞
14 simplll A * B * ¬ A = 0 ¬ B = 0 ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ A *
15 elxr A * A A = +∞ A = −∞
16 14 15 sylib A * B * ¬ A = 0 ¬ B = 0 ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ A A = +∞ A = −∞
17 idd A * B * ¬ A = 0 ¬ B = 0 ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ A A
18 simprlr ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ ¬ B < 0 A = +∞
19 18 adantl A * B * ¬ A = 0 ¬ B = 0 ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ ¬ B < 0 A = +∞
20 19 pm2.21d A * B * ¬ A = 0 ¬ B = 0 ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ B < 0 A = +∞ A
21 20 expdimp A * B * ¬ A = 0 ¬ B = 0 ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ B < 0 A = +∞ A
22 simplrr A * B * ¬ A = 0 ¬ B = 0 ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ ¬ B = 0
23 22 pm2.21d A * B * ¬ A = 0 ¬ B = 0 ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ B = 0 A = +∞ A
24 23 imp A * B * ¬ A = 0 ¬ B = 0 ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ B = 0 A = +∞ A
25 simplll ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ ¬ 0 < B A = +∞
26 25 adantl A * B * ¬ A = 0 ¬ B = 0 ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ ¬ 0 < B A = +∞
27 26 pm2.21d A * B * ¬ A = 0 ¬ B = 0 ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ 0 < B A = +∞ A
28 27 expdimp A * B * ¬ A = 0 ¬ B = 0 ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ 0 < B A = +∞ A
29 simpllr A * B * ¬ A = 0 ¬ B = 0 ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ B *
30 0xr 0 *
31 xrltso < Or *
32 solin < Or * B * 0 * B < 0 B = 0 0 < B
33 31 32 mpan B * 0 * B < 0 B = 0 0 < B
34 29 30 33 sylancl A * B * ¬ A = 0 ¬ B = 0 ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ B < 0 B = 0 0 < B
35 21 24 28 34 mpjao3dan A * B * ¬ A = 0 ¬ B = 0 ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ A = +∞ A
36 simpllr ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ ¬ B < 0 A = −∞
37 36 adantl A * B * ¬ A = 0 ¬ B = 0 ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ ¬ B < 0 A = −∞
38 37 pm2.21d A * B * ¬ A = 0 ¬ B = 0 ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ B < 0 A = −∞ A
39 38 expdimp A * B * ¬ A = 0 ¬ B = 0 ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ B < 0 A = −∞ A
40 22 pm2.21d A * B * ¬ A = 0 ¬ B = 0 ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ B = 0 A = −∞ A
41 40 imp A * B * ¬ A = 0 ¬ B = 0 ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ B = 0 A = −∞ A
42 simprll ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ ¬ 0 < B A = −∞
43 42 adantl A * B * ¬ A = 0 ¬ B = 0 ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ ¬ 0 < B A = −∞
44 43 pm2.21d A * B * ¬ A = 0 ¬ B = 0 ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ 0 < B A = −∞ A
45 44 expdimp A * B * ¬ A = 0 ¬ B = 0 ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ 0 < B A = −∞ A
46 39 41 45 34 mpjao3dan A * B * ¬ A = 0 ¬ B = 0 ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ A = −∞ A
47 17 35 46 3jaod A * B * ¬ A = 0 ¬ B = 0 ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ A A = +∞ A = −∞ A
48 16 47 mpd A * B * ¬ A = 0 ¬ B = 0 ¬ 0 < B A = +∞ ¬ B < 0 A = −∞ ¬ 0 < A B = +∞ ¬ A < 0 B = −∞ ¬ 0 < B A = −∞ ¬ B < 0 A = +∞ ¬ 0 < A B = −∞ ¬ A < 0 B = +∞ A
49 2 13 48 syl2anb A * B * ¬ A = 0 B = 0 ¬ 0 < B A = +∞ B < 0 A = −∞ 0 < A B = +∞ A < 0 B = −∞ ¬ 0 < B A = −∞ B < 0 A = +∞ 0 < A B = −∞ A < 0 B = +∞ A
50 49 anassrs A * B * ¬ A = 0 B = 0 ¬ 0 < B A = +∞ B < 0 A = −∞ 0 < A B = +∞ A < 0 B = −∞ ¬ 0 < B A = −∞ B < 0 A = +∞ 0 < A B = −∞ A < 0 B = +∞ A