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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 9332. (Contributed by David A. Wheeler, 4-Jan-2017.) |
| Ref | Expression |
|---|---|
| 2m1e1 | ⊢ (2 − 1) = 1 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2cn 9257 | . 2 ⊢ 2 ∈ ℂ | |
| 2 | ax-1cn 8168 | . 2 ⊢ 1 ∈ ℂ | |
| 3 | 1p1e2 9303 | . 2 ⊢ (1 + 1) = 2 | |
| 4 | 1, 2, 2, 3 | subaddrii 8511 | 1 ⊢ (2 − 1) = 1 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1398 (class class class)co 6028 1c1 8076 − cmin 8393 2c2 9237 |
| 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 2205 ax-ext 2213 ax-sep 4212 ax-pow 4270 ax-pr 4305 ax-setind 4641 ax-resscn 8167 ax-1cn 8168 ax-1re 8169 ax-icn 8170 ax-addcl 8171 ax-addrcl 8172 ax-mulcl 8173 ax-addcom 8175 ax-addass 8177 ax-distr 8179 ax-i2m1 8180 ax-0id 8183 ax-rnegex 8184 ax-cnre 8186 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ne 2404 df-ral 2516 df-rex 2517 df-reu 2518 df-rab 2520 df-v 2805 df-sbc 3033 df-dif 3203 df-un 3205 df-in 3207 df-ss 3214 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-br 4094 df-opab 4156 df-id 4396 df-xp 4737 df-rel 4738 df-cnv 4739 df-co 4740 df-dm 4741 df-iota 5293 df-fun 5335 df-fv 5341 df-riota 5981 df-ov 6031 df-oprab 6032 df-mpo 6033 df-sub 8395 df-2 9245 |
| This theorem is referenced by: 1e2m1 9305 1mhlfehlf 9405 subhalfhalf 9422 addltmul 9424 xp1d2m1eqxm1d2 9440 nn0lt2 9604 nn0le2is012 9605 zeo 9628 fzo0to2pr 10507 bcn2 11070 maxabslemlub 11828 geo2sum2 12137 ege2le3 12293 cos2tsin 12373 cos12dec 12390 odd2np1 12495 oddp1even 12498 mod2eq1n2dvds 12501 oddge22np1 12503 prmdiv 12868 hoverb 15439 sin0pilem1 15572 cos2pi 15595 cosq34lt1 15641 lgslem4 15802 gausslemma2dlem1a 15857 lgseisenlem1 15869 2lgslem3c 15894 clwwlkn2 16342 clwwlkext2edg 16343 ex-fl 16419 |
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