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Mirrors > Home > MPE Home > Th. List > Mathboxes > padd01 | Structured version Visualization version GIF version |
Description: Projective subspace sum with an empty set. (Contributed by NM, 11-Jan-2012.) |
Ref | Expression |
---|---|
padd0.a | ⊢ 𝐴 = (Atoms‘𝐾) |
padd0.p | ⊢ + = (+𝑃‘𝐾) |
Ref | Expression |
---|---|
padd01 | ⊢ ((𝐾 ∈ 𝐵 ∧ 𝑋 ⊆ 𝐴) → (𝑋 + ∅) = 𝑋) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simpl 486 | . . . 4 ⊢ ((𝐾 ∈ 𝐵 ∧ 𝑋 ⊆ 𝐴) → 𝐾 ∈ 𝐵) | |
2 | simpr 488 | . . . 4 ⊢ ((𝐾 ∈ 𝐵 ∧ 𝑋 ⊆ 𝐴) → 𝑋 ⊆ 𝐴) | |
3 | 0ss 4295 | . . . . 5 ⊢ ∅ ⊆ 𝐴 | |
4 | 3 | a1i 11 | . . . 4 ⊢ ((𝐾 ∈ 𝐵 ∧ 𝑋 ⊆ 𝐴) → ∅ ⊆ 𝐴) |
5 | 1, 2, 4 | 3jca 1125 | . . 3 ⊢ ((𝐾 ∈ 𝐵 ∧ 𝑋 ⊆ 𝐴) → (𝐾 ∈ 𝐵 ∧ 𝑋 ⊆ 𝐴 ∧ ∅ ⊆ 𝐴)) |
6 | neirr 2960 | . . . 4 ⊢ ¬ ∅ ≠ ∅ | |
7 | 6 | intnan 490 | . . 3 ⊢ ¬ (𝑋 ≠ ∅ ∧ ∅ ≠ ∅) |
8 | padd0.a | . . . 4 ⊢ 𝐴 = (Atoms‘𝐾) | |
9 | padd0.p | . . . 4 ⊢ + = (+𝑃‘𝐾) | |
10 | 8, 9 | paddval0 37420 | . . 3 ⊢ (((𝐾 ∈ 𝐵 ∧ 𝑋 ⊆ 𝐴 ∧ ∅ ⊆ 𝐴) ∧ ¬ (𝑋 ≠ ∅ ∧ ∅ ≠ ∅)) → (𝑋 + ∅) = (𝑋 ∪ ∅)) |
11 | 5, 7, 10 | sylancl 589 | . 2 ⊢ ((𝐾 ∈ 𝐵 ∧ 𝑋 ⊆ 𝐴) → (𝑋 + ∅) = (𝑋 ∪ ∅)) |
12 | un0 4289 | . 2 ⊢ (𝑋 ∪ ∅) = 𝑋 | |
13 | 11, 12 | eqtrdi 2809 | 1 ⊢ ((𝐾 ∈ 𝐵 ∧ 𝑋 ⊆ 𝐴) → (𝑋 + ∅) = 𝑋) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 399 ∧ w3a 1084 = wceq 1538 ∈ wcel 2111 ≠ wne 2951 ∪ cun 3858 ⊆ wss 3860 ∅c0 4227 ‘cfv 6340 (class class class)co 7156 Atomscatm 36873 +𝑃cpadd 37405 |
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 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2729 ax-rep 5160 ax-sep 5173 ax-nul 5180 ax-pow 5238 ax-pr 5302 ax-un 7465 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-tru 1541 df-fal 1551 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2557 df-eu 2588 df-clab 2736 df-cleq 2750 df-clel 2830 df-nfc 2901 df-ne 2952 df-ral 3075 df-rex 3076 df-reu 3077 df-rab 3079 df-v 3411 df-sbc 3699 df-csb 3808 df-dif 3863 df-un 3865 df-in 3867 df-ss 3877 df-nul 4228 df-if 4424 df-pw 4499 df-sn 4526 df-pr 4528 df-op 4532 df-uni 4802 df-iun 4888 df-br 5037 df-opab 5099 df-mpt 5117 df-id 5434 df-xp 5534 df-rel 5535 df-cnv 5536 df-co 5537 df-dm 5538 df-rn 5539 df-res 5540 df-ima 5541 df-iota 6299 df-fun 6342 df-fn 6343 df-f 6344 df-f1 6345 df-fo 6346 df-f1o 6347 df-fv 6348 df-ov 7159 df-oprab 7160 df-mpo 7161 df-1st 7699 df-2nd 7700 df-padd 37406 |
This theorem is referenced by: paddasslem17 37446 pmodlem2 37457 |
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