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| Description: Introduction of a disjunct. Theorem *2.2 of [WhiteheadRussell] p. 104. (Contributed by NM, 30-Aug-1993.) (Revised by NM, 31-Jan-2015.) |
| Ref | Expression |
|---|---|
| orc |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | id 19 |
. . 3
| |
| 2 | jaob 722 |
. . 3
| |
| 3 | 1, 2 | mpbi 145 |
. 2
|
| 4 | 3 | simpli 111 |
1
|
| Colors of variables: wff set class |
| This proof depends on syntax axioms:
|
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-io 721 |
| This proof depends on definitions: df-bi 117 |
| This theorem is used by: pm2.67-2 725 pm1.4 739 orci 743 orcd 745 orcs 747 pm2.45 750 biorfi 758 pm1.5 777 pm2.4 790 pm4.44 791 pm4.78i 794 pm4.45 796 pm3.48 797 pm2.76 820 orabs 826 ordi 828 andi 830 pm4.72 839 biort 841 dcim 853 pm2.54dc 903 pm2.85dc 917 dcor 948 pm5.71dc 974 dedlema 982 3mix1 1197 xoranor 1426 19.33 1537 hbor 1599 nford 1620 19.30dc 1680 19.43 1681 19.32r 1732 moor 2158 r19.32r 2697 ssun1 3392 undif3ss 3492 reuun1 3515 prmg 3835 opthpr 3897 exmidn0m 4340 issod 4466 elelsuc 4556 ordtri2or2exmidlem 4675 regexmidlem1 4682 fununmo 5426 nndceq 6776 nndcel 6777 swoord1 6840 swoord2 6841 exmidontri2or 7608 addlocprlem 7908 msqge0 8952 mulge0 8955 ltleap 8968 nn1m1nn 9331 elnnz 9665 zletric 9699 zlelttric 9700 zmulcl 9709 zdceq 9731 zdcle 9732 zdclt 9733 ltpnf 10199 xrlttri3 10216 xrpnfdc 10261 xrmnfdc 10262 fzdcel 10461 qletric 10693 qlelttric 10694 qdceq 10696 qdclt 10697 qsqeqor 11108 hashfiv01gt1 11243 isum 12177 iprodap 12372 iprodap0 12374 nn0o1gt2 12697 prm23lt5 13071 4sqlem17 13215 gsummptfidmsplit 14254 ppiprm 16259 ppidif 16269 gausslemma2dlem0f 16378 bj-trdc 16985 bj-nn0suc0 17181 triap 17284 tridceq 17313 |
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