| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > 4pos | GIF version | ||
| Description: The number 4 is positive. (Contributed by NM, 27-May-1999.) |
| Ref | Expression |
|---|---|
| 4pos | ⊢ 0 < 4 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3re 9216 | . . 3 ⊢ 3 ∈ ℝ | |
| 2 | 1re 8177 | . . 3 ⊢ 1 ∈ ℝ | |
| 3 | 3pos 9236 | . . 3 ⊢ 0 < 3 | |
| 4 | 0lt1 8305 | . . 3 ⊢ 0 < 1 | |
| 5 | 1, 2, 3, 4 | addgt0ii 8670 | . 2 ⊢ 0 < (3 + 1) |
| 6 | df-4 9203 | . 2 ⊢ 4 = (3 + 1) | |
| 7 | 5, 6 | breqtrri 4115 | 1 ⊢ 0 < 4 |
| Colors of variables: wff set class |
| Syntax hints: class class class wbr 4088 (class class class)co 6017 0cc0 8031 1c1 8032 + caddc 8034 < clt 8213 3c3 9194 4c4 9195 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 ax-un 4530 ax-setind 4635 ax-cnex 8122 ax-resscn 8123 ax-1cn 8124 ax-1re 8125 ax-icn 8126 ax-addcl 8127 ax-addrcl 8128 ax-mulcl 8129 ax-addcom 8131 ax-addass 8133 ax-i2m1 8136 ax-0lt1 8137 ax-0id 8139 ax-rnegex 8140 ax-pre-lttrn 8145 ax-pre-ltadd 8147 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ne 2403 df-nel 2498 df-ral 2515 df-rex 2516 df-rab 2519 df-v 2804 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-br 4089 df-opab 4151 df-xp 4731 df-iota 5286 df-fv 5334 df-ov 6020 df-pnf 8215 df-mnf 8216 df-ltxr 8218 df-2 9201 df-3 9202 df-4 9203 |
| This theorem is referenced by: 4ne0 9240 4ap0 9241 5pos 9242 8th4div3 9362 div4p1lem1div2 9397 fldiv4p1lem1div2 10564 iexpcyc 10905 faclbnd2 11003 resqrexlemover 11570 resqrexlemcalc1 11574 resqrexlemcalc2 11575 resqrexlemcalc3 11576 resqrexlemnm 11578 resqrexlemga 11583 sqrt2gt1lt2 11609 flodddiv4 12496 dveflem 15449 coseq0negpitopi 15559 sincos4thpi 15563 gausslemma2dlem0d 15780 |
| Copyright terms: Public domain | W3C validator |