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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 9291. (Contributed by David A. Wheeler, 4-Jan-2017.) |
| Ref | Expression |
|---|---|
| 2m1e1 | ⊢ (2 − 1) = 1 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2cn 9216 | . 2 ⊢ 2 ∈ ℂ | |
| 2 | ax-1cn 8127 | . 2 ⊢ 1 ∈ ℂ | |
| 3 | 1p1e2 9262 | . 2 ⊢ (1 + 1) = 2 | |
| 4 | 1, 2, 2, 3 | subaddrii 8470 | 1 ⊢ (2 − 1) = 1 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1397 (class class class)co 6020 1c1 8035 − cmin 8352 2c2 9196 |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-14 2204 ax-ext 2212 ax-sep 4206 ax-pow 4263 ax-pr 4298 ax-setind 4634 ax-resscn 8126 ax-1cn 8127 ax-1re 8128 ax-icn 8129 ax-addcl 8130 ax-addrcl 8131 ax-mulcl 8132 ax-addcom 8134 ax-addass 8136 ax-distr 8138 ax-i2m1 8139 ax-0id 8142 ax-rnegex 8143 ax-cnre 8145 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1810 df-eu 2081 df-mo 2082 df-clab 2217 df-cleq 2223 df-clel 2226 df-nfc 2362 df-ne 2402 df-ral 2514 df-rex 2515 df-reu 2516 df-rab 2518 df-v 2803 df-sbc 3031 df-dif 3201 df-un 3203 df-in 3205 df-ss 3212 df-pw 3653 df-sn 3674 df-pr 3675 df-op 3677 df-uni 3893 df-br 4088 df-opab 4150 df-id 4389 df-xp 4730 df-rel 4731 df-cnv 4732 df-co 4733 df-dm 4734 df-iota 5285 df-fun 5327 df-fv 5333 df-riota 5973 df-ov 6023 df-oprab 6024 df-mpo 6025 df-sub 8354 df-2 9204 |
| This theorem is referenced by: 1e2m1 9264 1mhlfehlf 9364 subhalfhalf 9381 addltmul 9383 xp1d2m1eqxm1d2 9399 nn0lt2 9563 nn0le2is012 9564 zeo 9587 fzo0to2pr 10466 bcn2 11029 maxabslemlub 11787 geo2sum2 12096 ege2le3 12252 cos2tsin 12332 cos12dec 12349 odd2np1 12454 oddp1even 12457 mod2eq1n2dvds 12460 oddge22np1 12462 prmdiv 12827 hoverb 15398 sin0pilem1 15531 cos2pi 15554 cosq34lt1 15600 lgslem4 15758 gausslemma2dlem1a 15813 lgseisenlem1 15825 2lgslem3c 15850 clwwlkn2 16298 clwwlkext2edg 16299 ex-fl 16375 |
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