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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 9433. (Contributed by David A. Wheeler, 4-Jan-2017.) |
| Ref | Expression |
|---|---|
| 2m1e1 | ⊢ (2 − 1) = 1 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2cn 9358 | . 2 ⊢ 2 ∈ ℂ | |
| 2 | ax-1cn 8266 | . 2 ⊢ 1 ∈ ℂ | |
| 3 | 1p1e2 9404 | . 2 ⊢ (1 + 1) = 2 | |
| 4 | 1, 2, 2, 3 | subaddrii 8609 | 1 ⊢ (2 − 1) = 1 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1402 (class class class)co 6079 1c1 8174 − cmin 8491 2c2 9338 |
| 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 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4247 ax-pow 4309 ax-pr 4344 ax-setind 4682 ax-resscn 8265 ax-1cn 8266 ax-1re 8267 ax-icn 8268 ax-addcl 8269 ax-addrcl 8270 ax-mulcl 8271 ax-addcom 8273 ax-addass 8275 ax-distr 8277 ax-i2m1 8278 ax-0id 8281 ax-rnegex 8282 ax-cnre 8284 |
| This theorem depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-ral 2533 df-rex 2534 df-reu 2535 df-rab 2537 df-v 2823 df-sbc 3052 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3714 df-pr 3715 df-op 3717 df-uni 3934 df-br 4129 df-opab 4191 df-id 4436 df-xp 4778 df-rel 4779 df-cnv 4780 df-co 4781 df-dm 4782 df-iota 5335 df-fun 5377 df-fv 5383 df-riota 6032 df-ov 6082 df-oprab 6083 df-mpo 6084 df-sub 8493 df-2 9346 |
| This theorem is referenced by: 1e2m1 9406 1mhlfehlf 9506 subhalfhalf 9523 addltmul 9525 xp1d2m1eqxm1d2 9541 nn0lt2 9710 nn0le2is012 9711 zeo 9734 fzo0to2pr 10619 bcn2 11185 maxabslemlub 11956 geo2sum2 12265 ege2le3 12421 cos2tsin 12501 cos12dec 12518 odd2np1 12623 oddp1even 12626 mod2eq1n2dvds 12629 oddge22np1 12631 prmdiv 12996 ballotfilem2 13211 hoverb 15732 sin0pilem1 15865 cos2pi 15888 cosq34lt1 15934 log2ublem3 16068 lgslem4 16105 gausslemma2dlem1a 16160 lgseisenlem1 16172 2lgslem3c 16197 clwwlkn2 16645 clwwlkext2edg 16646 ex-fl 16722 |
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