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| Mirrors > Home > MPE Home > Th. List > Mathboxes > 1t1e1ALT | Structured version Visualization version GIF version | ||
| Description: Alternate proof of 1t1e1 12304 using a different set of axioms (add ax-mulrcl 11091, ax-i2m1 11096, ax-1ne0 11097, ax-rrecex 11100 and remove ax-resscn 11085, ax-mulcom 11092, ax-mulass 11094, ax-distr 11095). (Contributed by Steven Nguyen, 20-Sep-2022.) (Proof modification is discouraged.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| 1t1e1ALT | ⊢ (1 · 1) = 1 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 1re 11134 | . 2 ⊢ 1 ∈ ℝ | |
| 2 | ax-1rid 11098 | . 2 ⊢ (1 ∈ ℝ → (1 · 1) = 1) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ (1 · 1) = 1 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1541 ∈ wcel 2113 (class class class)co 7358 ℝcr 11027 1c1 11029 · cmul 11033 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2708 ax-1cn 11086 ax-icn 11087 ax-addcl 11088 ax-mulcl 11090 ax-mulrcl 11091 ax-i2m1 11096 ax-1ne0 11097 ax-1rid 11098 ax-rrecex 11100 ax-cnre 11101 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2715 df-cleq 2728 df-clel 2811 df-ne 2933 df-ral 3052 df-rex 3061 df-rab 3400 df-v 3442 df-dif 3904 df-un 3906 df-ss 3918 df-nul 4286 df-if 4480 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-br 5099 df-iota 6448 df-fv 6500 df-ov 7361 |
| This theorem is referenced by: nnmul1com 42547 remulinvcom 42709 sn-0tie0 42727 |
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