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| Mirrors > Home > ILE Home > Th. List > 2m1e1 | GIF version | ||
| Description: 2 - 1 = 1. The result is on the right-hand-side to be consistent with similar proofs like 4p4e8 9272. (Contributed by David A. Wheeler, 4-Jan-2017.) |
| Ref | Expression |
|---|---|
| 2m1e1 | ⊢ (2 − 1) = 1 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2cn 9197 | . 2 ⊢ 2 ∈ ℂ | |
| 2 | ax-1cn 8108 | . 2 ⊢ 1 ∈ ℂ | |
| 3 | 1p1e2 9243 | . 2 ⊢ (1 + 1) = 2 | |
| 4 | 1, 2, 2, 3 | subaddrii 8451 | 1 ⊢ (2 − 1) = 1 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1395 (class class class)co 6010 1c1 8016 − cmin 8333 2c2 9177 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-14 2203 ax-ext 2211 ax-sep 4202 ax-pow 4259 ax-pr 4294 ax-setind 4630 ax-resscn 8107 ax-1cn 8108 ax-1re 8109 ax-icn 8110 ax-addcl 8111 ax-addrcl 8112 ax-mulcl 8113 ax-addcom 8115 ax-addass 8117 ax-distr 8119 ax-i2m1 8120 ax-0id 8123 ax-rnegex 8124 ax-cnre 8126 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-ral 2513 df-rex 2514 df-reu 2515 df-rab 2517 df-v 2801 df-sbc 3029 df-dif 3199 df-un 3201 df-in 3203 df-ss 3210 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-br 4084 df-opab 4146 df-id 4385 df-xp 4726 df-rel 4727 df-cnv 4728 df-co 4729 df-dm 4730 df-iota 5281 df-fun 5323 df-fv 5329 df-riota 5963 df-ov 6013 df-oprab 6014 df-mpo 6015 df-sub 8335 df-2 9185 |
| This theorem is referenced by: 1e2m1 9245 1mhlfehlf 9345 subhalfhalf 9362 addltmul 9364 xp1d2m1eqxm1d2 9380 nn0lt2 9544 nn0le2is012 9545 zeo 9568 fzo0to2pr 10441 bcn2 11003 maxabslemlub 11739 geo2sum2 12047 ege2le3 12203 cos2tsin 12283 cos12dec 12300 odd2np1 12405 oddp1even 12408 mod2eq1n2dvds 12411 oddge22np1 12413 prmdiv 12778 hoverb 15343 sin0pilem1 15476 cos2pi 15499 cosq34lt1 15545 lgslem4 15703 gausslemma2dlem1a 15758 lgseisenlem1 15770 2lgslem3c 15795 clwwlkn2 16189 clwwlkext2edg 16190 ex-fl 16198 |
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