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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 9153. (Contributed by David A. Wheeler, 4-Jan-2017.) |
| Ref | Expression |
|---|---|
| 2m1e1 | ⊢ (2 − 1) = 1 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2cn 9078 | . 2 ⊢ 2 ∈ ℂ | |
| 2 | ax-1cn 7989 | . 2 ⊢ 1 ∈ ℂ | |
| 3 | 1p1e2 9124 | . 2 ⊢ (1 + 1) = 2 | |
| 4 | 1, 2, 2, 3 | subaddrii 8332 | 1 ⊢ (2 − 1) = 1 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1364 (class class class)co 5925 1c1 7897 − cmin 8214 2c2 9058 |
| 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 615 ax-in2 616 ax-io 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-14 2170 ax-ext 2178 ax-sep 4152 ax-pow 4208 ax-pr 4243 ax-setind 4574 ax-resscn 7988 ax-1cn 7989 ax-1re 7990 ax-icn 7991 ax-addcl 7992 ax-addrcl 7993 ax-mulcl 7994 ax-addcom 7996 ax-addass 7998 ax-distr 8000 ax-i2m1 8001 ax-0id 8004 ax-rnegex 8005 ax-cnre 8007 |
| This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1475 df-sb 1777 df-eu 2048 df-mo 2049 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ne 2368 df-ral 2480 df-rex 2481 df-reu 2482 df-rab 2484 df-v 2765 df-sbc 2990 df-dif 3159 df-un 3161 df-in 3163 df-ss 3170 df-pw 3608 df-sn 3629 df-pr 3630 df-op 3632 df-uni 3841 df-br 4035 df-opab 4096 df-id 4329 df-xp 4670 df-rel 4671 df-cnv 4672 df-co 4673 df-dm 4674 df-iota 5220 df-fun 5261 df-fv 5267 df-riota 5880 df-ov 5928 df-oprab 5929 df-mpo 5930 df-sub 8216 df-2 9066 |
| This theorem is referenced by: 1e2m1 9126 1mhlfehlf 9226 subhalfhalf 9243 addltmul 9245 xp1d2m1eqxm1d2 9261 nn0lt2 9424 nn0le2is012 9425 zeo 9448 fzo0to2pr 10311 bcn2 10873 maxabslemlub 11389 geo2sum2 11697 ege2le3 11853 cos2tsin 11933 cos12dec 11950 odd2np1 12055 oddp1even 12058 mod2eq1n2dvds 12061 oddge22np1 12063 prmdiv 12428 hoverb 14968 sin0pilem1 15101 cos2pi 15124 cosq34lt1 15170 lgslem4 15328 gausslemma2dlem1a 15383 lgseisenlem1 15395 2lgslem3c 15420 ex-fl 15455 |
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