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Mirrors > Home > QLE Home > Th. List > cmtr1com | Unicode version |
Description: Commutator equal to 1 commutes. Theorem 2.11 of Beran, p. 86. |
Ref | Expression |
---|---|
cmtr1com.1 |
Ref | Expression |
---|---|
cmtr1com |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | lea 160 | . . . . . 6 | |
2 | lea 160 | . . . . . 6 | |
3 | 1, 2 | lel2or 170 | . . . . 5 |
4 | 3 | df-le2 131 | . . . 4 |
5 | le1 146 | . . . . 5 | |
6 | df-cmtr 134 | . . . . . . 7 | |
7 | cmtr1com.1 | . . . . . . 7 | |
8 | ax-a2 31 | . . . . . . 7 | |
9 | 6, 7, 8 | 3tr2 64 | . . . . . 6 |
10 | lea 160 | . . . . . . . 8 | |
11 | lea 160 | . . . . . . . 8 | |
12 | 10, 11 | lel2or 170 | . . . . . . 7 |
13 | 12 | leror 152 | . . . . . 6 |
14 | 9, 13 | bltr 138 | . . . . 5 |
15 | 5, 14 | lebi 145 | . . . 4 |
16 | 4, 15 | lem3.1 443 | . . 3 |
17 | 16 | ax-r1 35 | . 2 |
18 | 17 | df-c1 132 | 1 |
Colors of variables: term |
Syntax hints: wb 1 wc 3 wn 4 wo 6 wa 7 wt 8 wcmtr 29 |
This theorem was proved from axioms: ax-a1 30 ax-a2 31 ax-a3 32 ax-a4 33 ax-a5 34 ax-r1 35 ax-r2 36 ax-r4 37 ax-r5 38 ax-r3 439 |
This theorem depends on definitions: df-b 39 df-a 40 df-t 41 df-f 42 df-le1 130 df-le2 131 df-c1 132 df-cmtr 134 |
This theorem is referenced by: (None) |
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