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| Mirrors > Home > ILE Home > Th. List > nn0lele2xi | GIF version | ||
| Description: 'Less than or equal to' implies 'less than or equal to twice' for nonnegative integers. (Contributed by Raph Levien, 10-Dec-2002.) |
| Ref | Expression |
|---|---|
| nn0lele2x.1 | ⊢ 𝑀 ∈ ℕ0 |
| nn0lele2x.2 | ⊢ 𝑁 ∈ ℕ0 |
| Ref | Expression |
|---|---|
| nn0lele2xi | ⊢ (𝑁 ≤ 𝑀 → 𝑁 ≤ (2 · 𝑀)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nn0lele2x.1 | . . 3 ⊢ 𝑀 ∈ ℕ0 | |
| 2 | 1 | nn0le2xi 9624 | . 2 ⊢ 𝑀 ≤ (2 · 𝑀) |
| 3 | nn0lele2x.2 | . . . 4 ⊢ 𝑁 ∈ ℕ0 | |
| 4 | 3 | nn0rei 9585 | . . 3 ⊢ 𝑁 ∈ ℝ |
| 5 | 1 | nn0rei 9585 | . . 3 ⊢ 𝑀 ∈ ℝ |
| 6 | 2re 9383 | . . . 4 ⊢ 2 ∈ ℝ | |
| 7 | 6, 5 | remulcli 8346 | . . 3 ⊢ (2 · 𝑀) ∈ ℝ |
| 8 | 4, 5, 7 | letri 8440 | . 2 ⊢ ((𝑁 ≤ 𝑀 ∧ 𝑀 ≤ (2 · 𝑀)) → 𝑁 ≤ (2 · 𝑀)) |
| 9 | 2, 8 | mpan2 429 | 1 ⊢ (𝑁 ≤ 𝑀 → 𝑁 ≤ (2 · 𝑀)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2209 class class class wbr 4131 (class class class)co 6088 · cmul 8190 ≤ cle 8367 2c2 9364 ℕ0cn0 9574 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4251 ax-pow 4313 ax-pr 4348 ax-un 4580 ax-setind 4686 ax-cnex 8276 ax-resscn 8277 ax-1cn 8278 ax-1re 8279 ax-icn 8280 ax-addcl 8281 ax-addrcl 8282 ax-mulcl 8283 ax-mulrcl 8284 ax-addcom 8285 ax-mulcom 8286 ax-addass 8287 ax-mulass 8288 ax-distr 8289 ax-i2m1 8290 ax-0lt1 8291 ax-1rid 8292 ax-0id 8293 ax-rnegex 8294 ax-cnre 8296 ax-pre-ltirr 8297 ax-pre-ltwlin 8298 ax-pre-lttrn 8299 ax-pre-ltadd 8301 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-nel 2516 df-ral 2533 df-rex 2534 df-rab 2537 df-v 2823 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-int 3971 df-br 4132 df-opab 4194 df-xp 4782 df-cnv 4784 df-iota 5340 df-fv 5388 df-ov 6091 df-pnf 8368 df-mnf 8369 df-xr 8370 df-ltxr 8371 df-le 8372 df-inn 9314 df-2 9372 df-n0 9575 |
| This theorem is used by: (None) |
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