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Mirrors > Home > MPE Home > Th. List > Mathboxes > brfvrcld | Structured version Visualization version GIF version |
Description: If two elements are connected by the reflexive closure of a relation, then they are connected via zero or one instances the relation. (Contributed by RP, 21-Jul-2020.) |
Ref | Expression |
---|---|
brfvrcld.r | ⊢ (𝜑 → 𝑅 ∈ V) |
Ref | Expression |
---|---|
brfvrcld | ⊢ (𝜑 → (𝐴(r*‘𝑅)𝐵 ↔ (𝐴(𝑅↑𝑟0)𝐵 ∨ 𝐴(𝑅↑𝑟1)𝐵))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dfrcl4 40027 | . . 3 ⊢ r* = (𝑟 ∈ V ↦ ∪ 𝑛 ∈ {0, 1} (𝑟↑𝑟𝑛)) | |
2 | brfvrcld.r | . . 3 ⊢ (𝜑 → 𝑅 ∈ V) | |
3 | 0nn0 11915 | . . . . 5 ⊢ 0 ∈ ℕ0 | |
4 | 1nn0 11916 | . . . . 5 ⊢ 1 ∈ ℕ0 | |
5 | prssi 4757 | . . . . 5 ⊢ ((0 ∈ ℕ0 ∧ 1 ∈ ℕ0) → {0, 1} ⊆ ℕ0) | |
6 | 3, 4, 5 | mp2an 690 | . . . 4 ⊢ {0, 1} ⊆ ℕ0 |
7 | 6 | a1i 11 | . . 3 ⊢ (𝜑 → {0, 1} ⊆ ℕ0) |
8 | 1, 2, 7 | brmptiunrelexpd 40034 | . 2 ⊢ (𝜑 → (𝐴(r*‘𝑅)𝐵 ↔ ∃𝑛 ∈ {0, 1}𝐴(𝑅↑𝑟𝑛)𝐵)) |
9 | oveq2 7167 | . . . . 5 ⊢ (𝑛 = 0 → (𝑅↑𝑟𝑛) = (𝑅↑𝑟0)) | |
10 | 9 | breqd 5080 | . . . 4 ⊢ (𝑛 = 0 → (𝐴(𝑅↑𝑟𝑛)𝐵 ↔ 𝐴(𝑅↑𝑟0)𝐵)) |
11 | oveq2 7167 | . . . . 5 ⊢ (𝑛 = 1 → (𝑅↑𝑟𝑛) = (𝑅↑𝑟1)) | |
12 | 11 | breqd 5080 | . . . 4 ⊢ (𝑛 = 1 → (𝐴(𝑅↑𝑟𝑛)𝐵 ↔ 𝐴(𝑅↑𝑟1)𝐵)) |
13 | 10, 12 | rexprg 4636 | . . 3 ⊢ ((0 ∈ ℕ0 ∧ 1 ∈ ℕ0) → (∃𝑛 ∈ {0, 1}𝐴(𝑅↑𝑟𝑛)𝐵 ↔ (𝐴(𝑅↑𝑟0)𝐵 ∨ 𝐴(𝑅↑𝑟1)𝐵))) |
14 | 3, 4, 13 | mp2an 690 | . 2 ⊢ (∃𝑛 ∈ {0, 1}𝐴(𝑅↑𝑟𝑛)𝐵 ↔ (𝐴(𝑅↑𝑟0)𝐵 ∨ 𝐴(𝑅↑𝑟1)𝐵)) |
15 | 8, 14 | syl6bb 289 | 1 ⊢ (𝜑 → (𝐴(r*‘𝑅)𝐵 ↔ (𝐴(𝑅↑𝑟0)𝐵 ∨ 𝐴(𝑅↑𝑟1)𝐵))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 208 ∨ wo 843 = wceq 1536 ∈ wcel 2113 ∃wrex 3142 Vcvv 3497 ⊆ wss 3939 {cpr 4572 class class class wbr 5069 ‘cfv 6358 (class class class)co 7159 0cc0 10540 1c1 10541 ℕ0cn0 11900 ↑𝑟crelexp 14382 r*crcl 40023 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1969 ax-7 2014 ax-8 2115 ax-9 2123 ax-10 2144 ax-11 2160 ax-12 2176 ax-ext 2796 ax-rep 5193 ax-sep 5206 ax-nul 5213 ax-pow 5269 ax-pr 5333 ax-un 7464 ax-cnex 10596 ax-resscn 10597 ax-1cn 10598 ax-icn 10599 ax-addcl 10600 ax-addrcl 10601 ax-mulcl 10602 ax-mulrcl 10603 ax-mulcom 10604 ax-addass 10605 ax-mulass 10606 ax-distr 10607 ax-i2m1 10608 ax-1ne0 10609 ax-1rid 10610 ax-rnegex 10611 ax-rrecex 10612 ax-cnre 10613 ax-pre-lttri 10614 ax-pre-lttrn 10615 ax-pre-ltadd 10616 ax-pre-mulgt0 10617 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1539 df-ex 1780 df-nf 1784 df-sb 2069 df-mo 2621 df-eu 2653 df-clab 2803 df-cleq 2817 df-clel 2896 df-nfc 2966 df-ne 3020 df-nel 3127 df-ral 3146 df-rex 3147 df-reu 3148 df-rab 3150 df-v 3499 df-sbc 3776 df-csb 3887 df-dif 3942 df-un 3944 df-in 3946 df-ss 3955 df-pss 3957 df-nul 4295 df-if 4471 df-pw 4544 df-sn 4571 df-pr 4573 df-tp 4575 df-op 4577 df-uni 4842 df-int 4880 df-iun 4924 df-br 5070 df-opab 5132 df-mpt 5150 df-tr 5176 df-id 5463 df-eprel 5468 df-po 5477 df-so 5478 df-fr 5517 df-we 5519 df-xp 5564 df-rel 5565 df-cnv 5566 df-co 5567 df-dm 5568 df-rn 5569 df-res 5570 df-ima 5571 df-pred 6151 df-ord 6197 df-on 6198 df-lim 6199 df-suc 6200 df-iota 6317 df-fun 6360 df-fn 6361 df-f 6362 df-f1 6363 df-fo 6364 df-f1o 6365 df-fv 6366 df-riota 7117 df-ov 7162 df-oprab 7163 df-mpo 7164 df-om 7584 df-2nd 7693 df-wrecs 7950 df-recs 8011 df-rdg 8049 df-er 8292 df-en 8513 df-dom 8514 df-sdom 8515 df-pnf 10680 df-mnf 10681 df-xr 10682 df-ltxr 10683 df-le 10684 df-sub 10875 df-neg 10876 df-nn 11642 df-n0 11901 df-z 11985 df-uz 12247 df-seq 13373 df-relexp 14383 df-rcl 40024 |
This theorem is referenced by: brfvrcld2 40043 |
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