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Related theorems GIF version |
| Description: Subset implies subset of subspace sum. |
| Ref | Expression |
|---|---|
| shincl.1 | ⊢ A ∈ Sℋ |
| shincl.2 | ⊢ B ∈ Sℋ |
| shless.1 | ⊢ C ∈ Sℋ |
| Ref | Expression |
|---|---|
| shless | ⊢ (A ⊆ B → (A +ℋ C) ⊆ (B +ℋ C)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ssel 1502 | . . . . . 6 ⊢ (A ⊆ B → (y ∈ A → y ∈ B)) | |
| 2 | 1 | anim1d 432 | . . . . 5 ⊢ (A ⊆ B → ((y ∈ A ∧ ∃z ∈ C x = (y +v z)) → (y ∈ B ∧ ∃z ∈ C x = (y +v z)))) |
| 3 | 2 | 19.22dv 947 | . . . 4 ⊢ (A ⊆ B → (∃y(y ∈ A ∧ ∃z ∈ C x = (y +v z)) → ∃y(y ∈ B ∧ ∃z ∈ C x = (y +v z)))) |
| 4 | df-rex 1206 | . . . 4 ⊢ (∃y ∈ A ∃z ∈ C x = (y +v z) ↔ ∃y(y ∈ A ∧ ∃z ∈ C x = (y +v z))) | |
| 5 | df-rex 1206 | . . . 4 ⊢ (∃y ∈ B ∃z ∈ C x = (y +v z) ↔ ∃y(y ∈ B ∧ ∃z ∈ C x = (y +v z))) | |
| 6 | 3, 4, 5 | 3imtr4g 426 | . . 3 ⊢ (A ⊆ B → (∃y ∈ A ∃z ∈ C x = (y +v z) → ∃y ∈ B ∃z ∈ C x = (y +v z))) |
| 7 | shincl.1 | . . . 4 ⊢ A ∈ Sℋ | |
| 8 | shless.1 | . . . 4 ⊢ C ∈ Sℋ | |
| 9 | 7, 8 | shsel 5281 | . . 3 ⊢ (x ∈ (A +ℋ C) ↔ ∃y ∈ A ∃z ∈ C x = (y +v z)) |
| 10 | shincl.2 | . . . 4 ⊢ B ∈ Sℋ | |
| 11 | 10, 8 | shsel 5281 | . . 3 ⊢ (x ∈ (B +ℋ C) ↔ ∃y ∈ B ∃z ∈ C x = (y +v z)) |
| 12 | 6, 9, 11 | 3imtr4g 426 | . 2 ⊢ (A ⊆ B → (x ∈ (A +ℋ C) → x ∈ (B +ℋ C))) |
| 13 | 12 | ssrdv 1509 | 1 ⊢ (A ⊆ B → (A +ℋ C) ⊆ (B +ℋ C)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 2 ∧ wa 196 ∃wex 678 = wceq 1091 ∈ wcel 1092 ∃wrex 1202 ⊆ wss 1487 (class class class)co 3001 +v cva 4959 Sℋ csh 4967 +ℋ cph 4970 |
| This theorem is referenced by: shslub 5359 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-13 804 ax-14 805 ax-16 922 ax-17 925 ax-ext 1074 ax-rep 1075 ax-pow 1077 ax-hilex 4983 ax-hvaddcl 4984 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-3an 583 df-ex 679 df-sb 853 df-eu 1009 df-mo 1010 df-clab 1093 df-cleq 1097 df-clel 1099 df-ral 1205 df-rex 1206 df-rab 1208 df-v 1349 df-dif 1489 df-un 1490 df-in 1491 df-ss 1492 df-nul 1708 df-pw 1799 df-sn 1811 df-pr 1812 df-op 1815 df-uni 1920 df-br 2063 df-opab 2098 df-id 2125 df-xp 2424 df-rel 2425 df-cnv 2426 df-co 2427 df-dm 2428 df-rn 2429 df-res 2430 df-ima 2431 df-fun 2432 df-fv 2438 df-opr 3003 df-oprab 3004 df-sh 5114 df-shsum 5275 |