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Related theorems GIF version |
| Description: Identity inference. |
| Ref | Expression |
|---|---|
| bi1.1 | a = b |
| Ref | Expression |
|---|---|
| bi1 | (a ≡ b) = 1 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | bi1.1 | . . 3 a = b | |
| 2 | 1 | rbi 90 | . 2 (a ≡ b) = (b ≡ b) |
| 3 | biid 108 | . 2 (b ≡ b) = 1 | |
| 4 | 2, 3 | ax-r2 35 | 1 (a ≡ b) = 1 |
| Colors of variables: term |
| Syntax hints: = wb 1 ≡ tb 5 1wt 9 |
| This theorem is referenced by: 1bi 111 wa1 183 wa2 184 wa3 185 wa4 186 wa5 187 wa6 188 wa5b 192 wa5c 193 wcon 194 wancom 195 wanass 196 ska2a 218 ska2b 219 ska5 225 ska6 226 ska7 227 ska8 228 ska9 229 ska10 230 ska12 232 bina1 274 bina2 275 wom5 363 wcomlem 364 wdf-c1 365 wle1 371 wle0 372 wlel 374 wleror 375 wleran 376 wlecon 377 wletr 378 wbile 383 wlebi 384 wle2or 385 wle2an 386 wledi 387 wledio 388 wcom0 389 wcom1 390 wlecom 391 wcomcom2 397 wcomd 400 wcom3ii 401 wcomcom5 402 wcomdr 403 wcom3i 404 wfh1 405 wfh2 406 wfh3 407 wfh4 408 wcom2or 409 wcom2an 410 wnbdi 411 wlem14 412 ska2 414 ska4 415 woml6 418 woml7 419 i3aa 503 i3abs2 505 i3orcom 507 i3ancom 508 bi3tr 509 i3btr 510 i3th6 530 |
| This theorem was proved from axioms: ax-a1 29 ax-a2 30 ax-a5 33 ax-r1 34 ax-r2 35 ax-r4 36 ax-r5 37 |
| This theorem depends on definitions: df-b 38 df-a 39 df-t 40 df-f 41 |