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Mirrors > Home > MPE Home > Th. List > Mathboxes > gbpart7 | Structured version Visualization version GIF version |
Description: The (weak) Goldbach partition of 7. (Contributed by AV, 20-Jul-2020.) |
Ref | Expression |
---|---|
gbpart7 | ⊢ 7 = ((2 + 2) + 3) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 2p2e4 11759 | . . 3 ⊢ (2 + 2) = 4 | |
2 | 1 | oveq1i 7152 | . 2 ⊢ ((2 + 2) + 3) = (4 + 3) |
3 | 4p3e7 11778 | . 2 ⊢ (4 + 3) = 7 | |
4 | 2, 3 | eqtr2i 2845 | 1 ⊢ 7 = ((2 + 2) + 3) |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1537 (class class class)co 7142 + caddc 10526 2c2 11679 3c3 11680 4c4 11681 7c7 11684 |
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 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-1cn 10581 ax-addcl 10583 ax-addass 10588 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-rab 3147 df-v 3488 df-dif 3927 df-un 3929 df-in 3931 df-ss 3940 df-nul 4280 df-if 4454 df-sn 4554 df-pr 4556 df-op 4560 df-uni 4825 df-br 5053 df-iota 6300 df-fv 6349 df-ov 7145 df-2 11687 df-3 11688 df-4 11689 df-5 11690 df-6 11691 df-7 11692 |
This theorem is referenced by: 7gbow 44022 |
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