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Mirrors > Home > MPE Home > Th. List > rncnvcnv | Structured version Visualization version GIF version |
Description: The range of the double converse of a class is equal to its range (even when that class in not a relation). (Contributed by NM, 8-Apr-2007.) |
Ref | Expression |
---|---|
rncnvcnv | ⊢ ran ◡◡𝐴 = ran 𝐴 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-rn 5565 | . 2 ⊢ ran 𝐴 = dom ◡𝐴 | |
2 | dfdm4 5763 | . 2 ⊢ dom ◡𝐴 = ran ◡◡𝐴 | |
3 | 1, 2 | eqtr2i 2845 | 1 ⊢ ran ◡◡𝐴 = ran 𝐴 |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1533 ◡ccnv 5553 dom cdm 5554 ran crn 5555 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2157 ax-12 2173 ax-ext 2793 ax-sep 5202 ax-nul 5209 ax-pr 5329 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-rab 3147 df-v 3496 df-dif 3938 df-un 3940 df-in 3942 df-ss 3951 df-nul 4291 df-if 4467 df-sn 4567 df-pr 4569 df-op 4573 df-br 5066 df-opab 5128 df-cnv 5562 df-dm 5564 df-rn 5565 |
This theorem is referenced by: rnresv 6057 trrelsuperrel2dg 40014 |
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