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| Mirrors > Home > ILE Home > Th. List > 4lt7 | GIF version | ||
| Description: 4 is less than 7. (Contributed by Mario Carneiro, 15-Sep-2013.) |
| Ref | Expression |
|---|---|
| 4lt7 | ⊢ 4 < 7 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 4lt5 9247 | . 2 ⊢ 4 < 5 | |
| 2 | 5lt7 9257 | . 2 ⊢ 5 < 7 | |
| 3 | 4re 9148 | . . 3 ⊢ 4 ∈ ℝ | |
| 4 | 5re 9150 | . . 3 ⊢ 5 ∈ ℝ | |
| 5 | 7re 9154 | . . 3 ⊢ 7 ∈ ℝ | |
| 6 | 3, 4, 5 | lttri 8212 | . 2 ⊢ ((4 < 5 ∧ 5 < 7) → 4 < 7) |
| 7 | 1, 2, 6 | mp2an 426 | 1 ⊢ 4 < 7 |
| Colors of variables: wff set class |
| Syntax hints: class class class wbr 4059 < clt 8142 4c4 9124 5c5 9125 7c7 9127 |
| 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 615 ax-in2 616 ax-io 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2180 ax-14 2181 ax-ext 2189 ax-sep 4178 ax-pow 4234 ax-pr 4269 ax-un 4498 ax-setind 4603 ax-cnex 8051 ax-resscn 8052 ax-1cn 8053 ax-1re 8054 ax-icn 8055 ax-addcl 8056 ax-addrcl 8057 ax-mulcl 8058 ax-addcom 8060 ax-addass 8062 ax-i2m1 8065 ax-0lt1 8066 ax-0id 8068 ax-rnegex 8069 ax-pre-lttrn 8074 ax-pre-ltadd 8076 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-fal 1379 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2194 df-cleq 2200 df-clel 2203 df-nfc 2339 df-ne 2379 df-nel 2474 df-ral 2491 df-rex 2492 df-rab 2495 df-v 2778 df-dif 3176 df-un 3178 df-in 3180 df-ss 3187 df-pw 3628 df-sn 3649 df-pr 3650 df-op 3652 df-uni 3865 df-br 4060 df-opab 4122 df-xp 4699 df-iota 5251 df-fv 5298 df-ov 5970 df-pnf 8144 df-mnf 8145 df-ltxr 8147 df-2 9130 df-3 9131 df-4 9132 df-5 9133 df-6 9134 df-7 9135 |
| This theorem is referenced by: 3lt7 9259 |
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