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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 9400. (Contributed by David A. Wheeler, 4-Jan-2017.) |
| Ref | Expression |
|---|---|
| 2m1e1 | ⊢ (2 − 1) = 1 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2cn 9325 | . 2 ⊢ 2 ∈ ℂ | |
| 2 | ax-1cn 8236 | . 2 ⊢ 1 ∈ ℂ | |
| 3 | 1p1e2 9371 | . 2 ⊢ (1 + 1) = 2 | |
| 4 | 1, 2, 2, 3 | subaddrii 8578 | 1 ⊢ (2 − 1) = 1 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1398 (class class class)co 6058 1c1 8144 − cmin 8460 2c2 9305 |
| 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 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-14 2208 ax-ext 2216 ax-sep 4233 ax-pow 4292 ax-pr 4327 ax-setind 4664 ax-resscn 8235 ax-1cn 8236 ax-1re 8237 ax-icn 8238 ax-addcl 8239 ax-addrcl 8240 ax-mulcl 8241 ax-addcom 8243 ax-addass 8245 ax-distr 8247 ax-i2m1 8248 ax-0id 8251 ax-rnegex 8252 ax-cnre 8254 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2085 df-mo 2086 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ne 2415 df-ral 2527 df-rex 2528 df-reu 2529 df-rab 2531 df-v 2817 df-sbc 3046 df-dif 3216 df-un 3218 df-in 3220 df-ss 3227 df-pw 3676 df-sn 3700 df-pr 3701 df-op 3703 df-uni 3920 df-br 4115 df-opab 4177 df-id 4419 df-xp 4760 df-rel 4761 df-cnv 4762 df-co 4763 df-dm 4764 df-iota 5317 df-fun 5359 df-fv 5365 df-riota 6011 df-ov 6061 df-oprab 6062 df-mpo 6063 df-sub 8462 df-2 9313 |
| This theorem is referenced by: 1e2m1 9373 1mhlfehlf 9473 subhalfhalf 9490 addltmul 9492 xp1d2m1eqxm1d2 9508 nn0lt2 9677 nn0le2is012 9678 zeo 9701 fzo0to2pr 10585 bcn2 11151 maxabslemlub 11917 geo2sum2 12226 ege2le3 12382 cos2tsin 12462 cos12dec 12479 odd2np1 12584 oddp1even 12587 mod2eq1n2dvds 12590 oddge22np1 12592 prmdiv 12957 ballotfilem2 13172 hoverb 15625 sin0pilem1 15758 cos2pi 15781 cosq34lt1 15827 lgslem4 15988 gausslemma2dlem1a 16043 lgseisenlem1 16055 2lgslem3c 16080 clwwlkn2 16528 clwwlkext2edg 16529 ex-fl 16605 |
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