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Mirrors > Home > MPE Home > Th. List > Mathboxes > 1t1e1ALT | Structured version Visualization version GIF version |
Description: Alternate proof of 1t1e1 12065 using a different set of axioms (add ax-mulrcl 10865, ax-i2m1 10870, ax-1ne0 10871, ax-rrecex 10874 and remove ax-resscn 10859, ax-mulcom 10866, ax-mulass 10868, ax-distr 10869). (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 10906 | . 2 ⊢ 1 ∈ ℝ | |
2 | ax-1rid 10872 | . 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 1539 ∈ wcel 2108 (class class class)co 7255 ℝcr 10801 1c1 10803 · cmul 10807 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-ext 2709 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-mulcl 10864 ax-mulrcl 10865 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rrecex 10874 ax-cnre 10875 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-sb 2069 df-clab 2716 df-cleq 2730 df-clel 2817 df-ne 2943 df-ral 3068 df-rex 3069 df-rab 3072 df-v 3424 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4254 df-if 4457 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4837 df-br 5071 df-iota 6376 df-fv 6426 df-ov 7258 |
This theorem is referenced by: nnmul1com 40222 remulinvcom 40335 sn-0tie0 40342 |
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