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Mirrors > Home > HSE Home > Th. List > cdj3lem3a | Structured version Visualization version GIF version |
Description: Lemma for cdj3i 30782. 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 29657 | . . 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 30779 | . . . . . . . . 9 ⊢ ((𝑣 ∈ 𝐴 ∧ 𝑢 ∈ 𝐵 ∧ (𝐴 ∩ 𝐵) = 0ℋ) → (𝑇‘(𝑣 +ℎ 𝑢)) = 𝑢) |
6 | simp2 1135 | . . . . . . . . 9 ⊢ ((𝑣 ∈ 𝐴 ∧ 𝑢 ∈ 𝐵 ∧ (𝐴 ∩ 𝐵) = 0ℋ) → 𝑢 ∈ 𝐵) | |
7 | 5, 6 | eqeltrd 2840 | . . . . . . . 8 ⊢ ((𝑣 ∈ 𝐴 ∧ 𝑢 ∈ 𝐵 ∧ (𝐴 ∩ 𝐵) = 0ℋ) → (𝑇‘(𝑣 +ℎ 𝑢)) ∈ 𝐵) |
8 | 7 | 3expa 1116 | . . . . . . 7 ⊢ (((𝑣 ∈ 𝐴 ∧ 𝑢 ∈ 𝐵) ∧ (𝐴 ∩ 𝐵) = 0ℋ) → (𝑇‘(𝑣 +ℎ 𝑢)) ∈ 𝐵) |
9 | fveq2 6768 | . . . . . . . 8 ⊢ (𝐶 = (𝑣 +ℎ 𝑢) → (𝑇‘𝐶) = (𝑇‘(𝑣 +ℎ 𝑢))) | |
10 | 9 | eleq1d 2824 | . . . . . . 7 ⊢ (𝐶 = (𝑣 +ℎ 𝑢) → ((𝑇‘𝐶) ∈ 𝐵 ↔ (𝑇‘(𝑣 +ℎ 𝑢)) ∈ 𝐵)) |
11 | 8, 10 | syl5ibr 245 | . . . . . 6 ⊢ (𝐶 = (𝑣 +ℎ 𝑢) → (((𝑣 ∈ 𝐴 ∧ 𝑢 ∈ 𝐵) ∧ (𝐴 ∩ 𝐵) = 0ℋ) → (𝑇‘𝐶) ∈ 𝐵)) |
12 | 11 | expd 415 | . . . . 5 ⊢ (𝐶 = (𝑣 +ℎ 𝑢) → ((𝑣 ∈ 𝐴 ∧ 𝑢 ∈ 𝐵) → ((𝐴 ∩ 𝐵) = 0ℋ → (𝑇‘𝐶) ∈ 𝐵))) |
13 | 12 | com13 88 | . . . 4 ⊢ ((𝐴 ∩ 𝐵) = 0ℋ → ((𝑣 ∈ 𝐴 ∧ 𝑢 ∈ 𝐵) → (𝐶 = (𝑣 +ℎ 𝑢) → (𝑇‘𝐶) ∈ 𝐵))) |
14 | 13 | rexlimdvv 3223 | . . 3 ⊢ ((𝐴 ∩ 𝐵) = 0ℋ → (∃𝑣 ∈ 𝐴 ∃𝑢 ∈ 𝐵 𝐶 = (𝑣 +ℎ 𝑢) → (𝑇‘𝐶) ∈ 𝐵)) |
15 | 3, 14 | syl5bi 241 | . 2 ⊢ ((𝐴 ∩ 𝐵) = 0ℋ → (𝐶 ∈ (𝐴 +ℋ 𝐵) → (𝑇‘𝐶) ∈ 𝐵)) |
16 | 15 | impcom 407 | 1 ⊢ ((𝐶 ∈ (𝐴 +ℋ 𝐵) ∧ (𝐴 ∩ 𝐵) = 0ℋ) → (𝑇‘𝐶) ∈ 𝐵) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 ∧ w3a 1085 = wceq 1541 ∈ wcel 2109 ∃wrex 3066 ∩ cin 3890 ↦ cmpt 5161 ‘cfv 6430 ℩crio 7224 (class class class)co 7268 +ℎ cva 29261 Sℋ csh 29269 +ℋ cph 29272 0ℋc0h 29276 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1801 ax-4 1815 ax-5 1916 ax-6 1974 ax-7 2014 ax-8 2111 ax-9 2119 ax-10 2140 ax-11 2157 ax-12 2174 ax-ext 2710 ax-rep 5213 ax-sep 5226 ax-nul 5233 ax-pow 5291 ax-pr 5355 ax-un 7579 ax-resscn 10912 ax-1cn 10913 ax-icn 10914 ax-addcl 10915 ax-addrcl 10916 ax-mulcl 10917 ax-mulrcl 10918 ax-mulcom 10919 ax-addass 10920 ax-mulass 10921 ax-distr 10922 ax-i2m1 10923 ax-1ne0 10924 ax-1rid 10925 ax-rnegex 10926 ax-rrecex 10927 ax-cnre 10928 ax-pre-lttri 10929 ax-pre-lttrn 10930 ax-pre-ltadd 10931 ax-pre-mulgt0 10932 ax-hilex 29340 ax-hfvadd 29341 ax-hvcom 29342 ax-hvass 29343 ax-hv0cl 29344 ax-hvaddid 29345 ax-hfvmul 29346 ax-hvmulid 29347 ax-hvmulass 29348 ax-hvdistr1 29349 ax-hvdistr2 29350 ax-hvmul0 29351 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1544 df-fal 1554 df-ex 1786 df-nf 1790 df-sb 2071 df-mo 2541 df-eu 2570 df-clab 2717 df-cleq 2731 df-clel 2817 df-nfc 2890 df-ne 2945 df-nel 3051 df-ral 3070 df-rex 3071 df-reu 3072 df-rmo 3073 df-rab 3074 df-v 3432 df-sbc 3720 df-csb 3837 df-dif 3894 df-un 3896 df-in 3898 df-ss 3908 df-nul 4262 df-if 4465 df-pw 4540 df-sn 4567 df-pr 4569 df-op 4573 df-uni 4845 df-iun 4931 df-br 5079 df-opab 5141 df-mpt 5162 df-id 5488 df-po 5502 df-so 5503 df-xp 5594 df-rel 5595 df-cnv 5596 df-co 5597 df-dm 5598 df-rn 5599 df-res 5600 df-ima 5601 df-iota 6388 df-fun 6432 df-fn 6433 df-f 6434 df-f1 6435 df-fo 6436 df-f1o 6437 df-fv 6438 df-riota 7225 df-ov 7271 df-oprab 7272 df-mpo 7273 df-er 8472 df-en 8708 df-dom 8709 df-sdom 8710 df-pnf 10995 df-mnf 10996 df-xr 10997 df-ltxr 10998 df-le 10999 df-sub 11190 df-neg 11191 df-div 11616 df-grpo 28834 df-ablo 28886 df-hvsub 29312 df-sh 29548 df-ch0 29594 df-shs 29649 |
This theorem is referenced by: (None) |
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