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Mirrors > Home > HSE Home > Th. List > cdj3lem3a | Structured version Visualization version GIF version |
Description: Lemma for cdj3i 28684. Closure of the second-component function 𝑇. (Contributed by NM, 26-May-2005.) (New usage is discouraged.) |
Ref | Expression |
---|---|
cdj3lem2.1 | ⊢ 𝐴 ∈ Sℋ |
cdj3lem2.2 | ⊢ 𝐵 ∈ Sℋ |
cdj3lem3.3 | ⊢ 𝑇 = (𝑥 ∈ (𝐴 +ℋ 𝐵) ↦ (℩𝑤 ∈ 𝐵 ∃𝑧 ∈ 𝐴 𝑥 = (𝑧 +ℎ 𝑤))) |
Ref | Expression |
---|---|
cdj3lem3a | ⊢ ((𝐶 ∈ (𝐴 +ℋ 𝐵) ∧ (𝐴 ∩ 𝐵) = 0ℋ) → (𝑇‘𝐶) ∈ 𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cdj3lem2.1 | . . . 4 ⊢ 𝐴 ∈ Sℋ | |
2 | cdj3lem2.2 | . . . 4 ⊢ 𝐵 ∈ Sℋ | |
3 | 1, 2 | shseli 27559 | . . 3 ⊢ (𝐶 ∈ (𝐴 +ℋ 𝐵) ↔ ∃𝑣 ∈ 𝐴 ∃𝑢 ∈ 𝐵 𝐶 = (𝑣 +ℎ 𝑢)) |
4 | cdj3lem3.3 | . . . . . . . . . 10 ⊢ 𝑇 = (𝑥 ∈ (𝐴 +ℋ 𝐵) ↦ (℩𝑤 ∈ 𝐵 ∃𝑧 ∈ 𝐴 𝑥 = (𝑧 +ℎ 𝑤))) | |
5 | 1, 2, 4 | cdj3lem3 28681 | . . . . . . . . 9 ⊢ ((𝑣 ∈ 𝐴 ∧ 𝑢 ∈ 𝐵 ∧ (𝐴 ∩ 𝐵) = 0ℋ) → (𝑇‘(𝑣 +ℎ 𝑢)) = 𝑢) |
6 | simp2 1055 | . . . . . . . . 9 ⊢ ((𝑣 ∈ 𝐴 ∧ 𝑢 ∈ 𝐵 ∧ (𝐴 ∩ 𝐵) = 0ℋ) → 𝑢 ∈ 𝐵) | |
7 | 5, 6 | eqeltrd 2688 | . . . . . . . 8 ⊢ ((𝑣 ∈ 𝐴 ∧ 𝑢 ∈ 𝐵 ∧ (𝐴 ∩ 𝐵) = 0ℋ) → (𝑇‘(𝑣 +ℎ 𝑢)) ∈ 𝐵) |
8 | 7 | 3expa 1257 | . . . . . . 7 ⊢ (((𝑣 ∈ 𝐴 ∧ 𝑢 ∈ 𝐵) ∧ (𝐴 ∩ 𝐵) = 0ℋ) → (𝑇‘(𝑣 +ℎ 𝑢)) ∈ 𝐵) |
9 | fveq2 6103 | . . . . . . . 8 ⊢ (𝐶 = (𝑣 +ℎ 𝑢) → (𝑇‘𝐶) = (𝑇‘(𝑣 +ℎ 𝑢))) | |
10 | 9 | eleq1d 2672 | . . . . . . 7 ⊢ (𝐶 = (𝑣 +ℎ 𝑢) → ((𝑇‘𝐶) ∈ 𝐵 ↔ (𝑇‘(𝑣 +ℎ 𝑢)) ∈ 𝐵)) |
11 | 8, 10 | syl5ibr 235 | . . . . . 6 ⊢ (𝐶 = (𝑣 +ℎ 𝑢) → (((𝑣 ∈ 𝐴 ∧ 𝑢 ∈ 𝐵) ∧ (𝐴 ∩ 𝐵) = 0ℋ) → (𝑇‘𝐶) ∈ 𝐵)) |
12 | 11 | expd 451 | . . . . 5 ⊢ (𝐶 = (𝑣 +ℎ 𝑢) → ((𝑣 ∈ 𝐴 ∧ 𝑢 ∈ 𝐵) → ((𝐴 ∩ 𝐵) = 0ℋ → (𝑇‘𝐶) ∈ 𝐵))) |
13 | 12 | com13 86 | . . . 4 ⊢ ((𝐴 ∩ 𝐵) = 0ℋ → ((𝑣 ∈ 𝐴 ∧ 𝑢 ∈ 𝐵) → (𝐶 = (𝑣 +ℎ 𝑢) → (𝑇‘𝐶) ∈ 𝐵))) |
14 | 13 | rexlimdvv 3019 | . . 3 ⊢ ((𝐴 ∩ 𝐵) = 0ℋ → (∃𝑣 ∈ 𝐴 ∃𝑢 ∈ 𝐵 𝐶 = (𝑣 +ℎ 𝑢) → (𝑇‘𝐶) ∈ 𝐵)) |
15 | 3, 14 | syl5bi 231 | . 2 ⊢ ((𝐴 ∩ 𝐵) = 0ℋ → (𝐶 ∈ (𝐴 +ℋ 𝐵) → (𝑇‘𝐶) ∈ 𝐵)) |
16 | 15 | impcom 445 | 1 ⊢ ((𝐶 ∈ (𝐴 +ℋ 𝐵) ∧ (𝐴 ∩ 𝐵) = 0ℋ) → (𝑇‘𝐶) ∈ 𝐵) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 383 ∧ w3a 1031 = wceq 1475 ∈ wcel 1977 ∃wrex 2897 ∩ cin 3539 ↦ cmpt 4643 ‘cfv 5804 ℩crio 6510 (class class class)co 6549 +ℎ cva 27161 Sℋ csh 27169 +ℋ cph 27172 0ℋc0h 27176 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-rep 4699 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-resscn 9872 ax-1cn 9873 ax-icn 9874 ax-addcl 9875 ax-addrcl 9876 ax-mulcl 9877 ax-mulrcl 9878 ax-mulcom 9879 ax-addass 9880 ax-mulass 9881 ax-distr 9882 ax-i2m1 9883 ax-1ne0 9884 ax-1rid 9885 ax-rnegex 9886 ax-rrecex 9887 ax-cnre 9888 ax-pre-lttri 9889 ax-pre-lttrn 9890 ax-pre-ltadd 9891 ax-pre-mulgt0 9892 ax-hilex 27240 ax-hfvadd 27241 ax-hvcom 27242 ax-hvass 27243 ax-hv0cl 27244 ax-hvaddid 27245 ax-hfvmul 27246 ax-hvmulid 27247 ax-hvmulass 27248 ax-hvdistr1 27249 ax-hvdistr2 27250 ax-hvmul0 27251 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-nel 2783 df-ral 2901 df-rex 2902 df-reu 2903 df-rmo 2904 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-op 4132 df-uni 4373 df-iun 4457 df-br 4584 df-opab 4644 df-mpt 4645 df-id 4953 df-po 4959 df-so 4960 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-riota 6511 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-er 7629 df-en 7842 df-dom 7843 df-sdom 7844 df-pnf 9955 df-mnf 9956 df-xr 9957 df-ltxr 9958 df-le 9959 df-sub 10147 df-neg 10148 df-div 10564 df-grpo 26731 df-ablo 26783 df-hvsub 27212 df-sh 27448 df-ch0 27494 df-shs 27551 |
This theorem is referenced by: (None) |
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