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| Mirrors > Home > MPE Home > Th. List > 1t1e1ALT | Structured version Visualization version GIF version | ||
| Description: Alternate proof of 1t1e1 12333 using a different set of axioms (add ax-mulrcl 11096, ax-i2m1 11101, ax-1ne0 11102, ax-rrecex 11105 and remove ax-resscn 11090, ax-mulcom 11097, ax-mulass 11099, ax-distr 11100). (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 11139 | . 2 ⊢ 1 ∈ ℝ | |
| 2 | ax-1rid 11103 | . 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 1542 ∈ wcel 2114 (class class class)co 7362 ℝcr 11032 1c1 11034 · cmul 11038 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2709 ax-1cn 11091 ax-icn 11092 ax-addcl 11093 ax-mulcl 11095 ax-mulrcl 11096 ax-i2m1 11101 ax-1ne0 11102 ax-1rid 11103 ax-rrecex 11105 ax-cnre 11106 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3391 df-v 3432 df-dif 3893 df-un 3895 df-ss 3907 df-nul 4275 df-if 4468 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-iota 6450 df-fv 6502 df-ov 7365 |
| This theorem is referenced by: nnmul1com 12229 remulinvcom 42885 sn-0tie0 42916 |
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