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| Mirrors > Home > ILE Home > Th. List > uznn0sub | GIF version | ||
| Description: The nonnegative difference of integers is a nonnegative integer. (Contributed by NM, 4-Sep-2005.) |
| Ref | Expression |
|---|---|
| uznn0sub | ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑁 − 𝑀) ∈ ℕ0) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eluz2 9656 | . 2 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) ↔ (𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝑀 ≤ 𝑁)) | |
| 2 | znn0sub 9440 | . . 3 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ) → (𝑀 ≤ 𝑁 ↔ (𝑁 − 𝑀) ∈ ℕ0)) | |
| 3 | 2 | biimp3a 1358 | . 2 ⊢ ((𝑀 ∈ ℤ ∧ 𝑁 ∈ ℤ ∧ 𝑀 ≤ 𝑁) → (𝑁 − 𝑀) ∈ ℕ0) |
| 4 | 1, 3 | sylbi 121 | 1 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑁 − 𝑀) ∈ ℕ0) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ w3a 981 ∈ wcel 2176 class class class wbr 4045 ‘cfv 5272 (class class class)co 5946 ≤ cle 8110 − cmin 8245 ℕ0cn0 9297 ℤcz 9374 ℤ≥cuz 9650 |
| 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 1470 ax-7 1471 ax-gen 1472 ax-ie1 1516 ax-ie2 1517 ax-8 1527 ax-10 1528 ax-11 1529 ax-i12 1530 ax-bndl 1532 ax-4 1533 ax-17 1549 ax-i9 1553 ax-ial 1557 ax-i5r 1558 ax-13 2178 ax-14 2179 ax-ext 2187 ax-sep 4163 ax-pow 4219 ax-pr 4254 ax-un 4481 ax-setind 4586 ax-cnex 8018 ax-resscn 8019 ax-1cn 8020 ax-1re 8021 ax-icn 8022 ax-addcl 8023 ax-addrcl 8024 ax-mulcl 8025 ax-addcom 8027 ax-addass 8029 ax-distr 8031 ax-i2m1 8032 ax-0lt1 8033 ax-0id 8035 ax-rnegex 8036 ax-cnre 8038 ax-pre-ltirr 8039 ax-pre-ltwlin 8040 ax-pre-lttrn 8041 ax-pre-ltadd 8043 |
| This theorem depends on definitions: df-bi 117 df-3or 982 df-3an 983 df-tru 1376 df-fal 1379 df-nf 1484 df-sb 1786 df-eu 2057 df-mo 2058 df-clab 2192 df-cleq 2198 df-clel 2201 df-nfc 2337 df-ne 2377 df-nel 2472 df-ral 2489 df-rex 2490 df-reu 2491 df-rab 2493 df-v 2774 df-sbc 2999 df-dif 3168 df-un 3170 df-in 3172 df-ss 3179 df-pw 3618 df-sn 3639 df-pr 3640 df-op 3642 df-uni 3851 df-int 3886 df-br 4046 df-opab 4107 df-mpt 4108 df-id 4341 df-xp 4682 df-rel 4683 df-cnv 4684 df-co 4685 df-dm 4686 df-rn 4687 df-res 4688 df-ima 4689 df-iota 5233 df-fun 5274 df-fn 5275 df-f 5276 df-fv 5280 df-riota 5901 df-ov 5949 df-oprab 5950 df-mpo 5951 df-pnf 8111 df-mnf 8112 df-xr 8113 df-ltxr 8114 df-le 8115 df-sub 8247 df-neg 8248 df-inn 9039 df-n0 9298 df-z 9375 df-uz 9651 |
| This theorem is referenced by: fznn0sub 10181 elfzmlbm 10255 frecfzen2 10574 fzfig 10577 leexp2a 10739 hashfz 10968 ccatrn 11068 cvgratnnlemnexp 11868 cvgratnnlemmn 11869 dvdsexp 12205 prmm2nn0 12488 hashdvds 12576 prmdiv 12590 prmdiveq 12591 pcaddlem 12695 gsumfzconst 13710 lgsquadlem1 15587 |
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