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| Description: A mixed syllogism inference from a nested implication and a biconditional. Useful for substituting an embedded consequent with a definition. |
| Ref | Expression |
|---|---|
| syl6ibr.1 |
|
| syl6ibr.2 |
|
| Ref | Expression |
|---|---|
| syl6ibr |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | syl6ibr.1 |
. 2
| |
| 2 | syl6ibr.2 |
. . 3
| |
| 3 | 2 | biimpr 134 |
. 2
|
| 4 | 1, 3 | syl6 23 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: imp4a 282 elimant 505 19.23 745 hband 788 mopick2 1057 2moswap 1064 2eu1 1067 r19.21ad 1261 cla4egf 1395 cla42gv 1399 rax5 1472 sssn 1852 pwpw0 1883 ssuni 1937 dfwe2 2187 wefrc 2195 ordsseleq 2227 ordtri3or 2230 ordtri3 2234 ordon 2238 tfis 2245 ssorduni 2249 oneqmini 2272 onmindif2 2313 nnsuc 2389 tfinds 2401 relss 2480 opeldm 2534 relssres 2596 cotr 2625 cnvsym 2626 funss 2682 fnun 2730 f1oun 2815 fvopab3ig 2869 chfnrn 2885 fvclss 2907 isomin 2937 isofrlem 2939 f1oweOLD 2944 rdglim2 2987 tz7.48lem 2993 tz7.49 2997 oprabvalig 3048 infsdomnn 3426 pssnn 3428 inf3lem4 3467 rankr1 3518 r1pwcl 3530 aceq5lem4 3561 aceq5 3563 aceq6b 3565 ac5b 3574 kmlem2 3581 zornlem4 3606 zornlem6 3608 zornlem7 3609 fodomb 3615 imadomg 3616 cardne 3637 carden 3638 carddom 3642 alephordi 3679 cardaleph 3690 carduniima 3695 cardinfima 3696 cflim 3704 indpi 3828 ltaddpq 3873 genpcl 3905 prlem934 3933 ltaddpr 3934 ltexprlem1 3936 ltexprlem5 3940 reclem4pr 3953 suplem1pr 3955 axrecex 4079 axsup 4088 zaddclt 4590 zmulclt 4596 zneo 4601 uzwo 4605 nnwoOLD 4608 nn0opth 4724 sqr2irr 4782 shmods 5363 orthin 5371 spansneleq 5475 h1datom 5483 osumlem4 5533 stcltr2 5708 sumdmdi 5785 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 |
| This theorem depends on definitions: df-bi 128 |