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Mirrors > Home > MPE Home > Th. List > Mathboxes > fzdif2 | Structured version Visualization version GIF version |
Description: Split the last element of a finite set of sequential integers. More generic than fzsuc 13313. (Contributed by Thierry Arnoux, 22-Aug-2020.) |
Ref | Expression |
---|---|
fzdif2 | ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → ((𝑀...𝑁) ∖ {𝑁}) = (𝑀...(𝑁 − 1))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fzspl 31119 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → (𝑀...𝑁) = ((𝑀...(𝑁 − 1)) ∪ {𝑁})) | |
2 | 1 | difeq1d 4055 | . . 3 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → ((𝑀...𝑁) ∖ {𝑁}) = (((𝑀...(𝑁 − 1)) ∪ {𝑁}) ∖ {𝑁})) |
3 | difun2 4414 | . . 3 ⊢ (((𝑀...(𝑁 − 1)) ∪ {𝑁}) ∖ {𝑁}) = ((𝑀...(𝑁 − 1)) ∖ {𝑁}) | |
4 | 2, 3 | eqtrdi 2794 | . 2 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → ((𝑀...𝑁) ∖ {𝑁}) = ((𝑀...(𝑁 − 1)) ∖ {𝑁})) |
5 | eluzelz 12602 | . . . . 5 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → 𝑁 ∈ ℤ) | |
6 | uzid 12607 | . . . . 5 ⊢ (𝑁 ∈ ℤ → 𝑁 ∈ (ℤ≥‘𝑁)) | |
7 | uznfz 13349 | . . . . 5 ⊢ (𝑁 ∈ (ℤ≥‘𝑁) → ¬ 𝑁 ∈ (𝑀...(𝑁 − 1))) | |
8 | 5, 6, 7 | 3syl 18 | . . . 4 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → ¬ 𝑁 ∈ (𝑀...(𝑁 − 1))) |
9 | disjsn 4647 | . . . 4 ⊢ (((𝑀...(𝑁 − 1)) ∩ {𝑁}) = ∅ ↔ ¬ 𝑁 ∈ (𝑀...(𝑁 − 1))) | |
10 | 8, 9 | sylibr 233 | . . 3 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → ((𝑀...(𝑁 − 1)) ∩ {𝑁}) = ∅) |
11 | disjdif2 4413 | . . 3 ⊢ (((𝑀...(𝑁 − 1)) ∩ {𝑁}) = ∅ → ((𝑀...(𝑁 − 1)) ∖ {𝑁}) = (𝑀...(𝑁 − 1))) | |
12 | 10, 11 | syl 17 | . 2 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → ((𝑀...(𝑁 − 1)) ∖ {𝑁}) = (𝑀...(𝑁 − 1))) |
13 | 4, 12 | eqtrd 2778 | 1 ⊢ (𝑁 ∈ (ℤ≥‘𝑀) → ((𝑀...𝑁) ∖ {𝑁}) = (𝑀...(𝑁 − 1))) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 = wceq 1539 ∈ wcel 2106 ∖ cdif 3883 ∪ cun 3884 ∩ cin 3885 ∅c0 4256 {csn 4561 ‘cfv 6426 (class class class)co 7267 1c1 10882 − cmin 11215 ℤcz 12329 ℤ≥cuz 12592 ...cfz 13249 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-sep 5221 ax-nul 5228 ax-pow 5286 ax-pr 5350 ax-un 7578 ax-cnex 10937 ax-resscn 10938 ax-1cn 10939 ax-icn 10940 ax-addcl 10941 ax-addrcl 10942 ax-mulcl 10943 ax-mulrcl 10944 ax-mulcom 10945 ax-addass 10946 ax-mulass 10947 ax-distr 10948 ax-i2m1 10949 ax-1ne0 10950 ax-1rid 10951 ax-rnegex 10952 ax-rrecex 10953 ax-cnre 10954 ax-pre-lttri 10955 ax-pre-lttrn 10956 ax-pre-ltadd 10957 ax-pre-mulgt0 10958 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-reu 3071 df-rab 3073 df-v 3431 df-sbc 3716 df-csb 3832 df-dif 3889 df-un 3891 df-in 3893 df-ss 3903 df-pss 3905 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-iun 4926 df-br 5074 df-opab 5136 df-mpt 5157 df-tr 5191 df-id 5484 df-eprel 5490 df-po 5498 df-so 5499 df-fr 5539 df-we 5541 df-xp 5590 df-rel 5591 df-cnv 5592 df-co 5593 df-dm 5594 df-rn 5595 df-res 5596 df-ima 5597 df-pred 6195 df-ord 6262 df-on 6263 df-lim 6264 df-suc 6265 df-iota 6384 df-fun 6428 df-fn 6429 df-f 6430 df-f1 6431 df-fo 6432 df-f1o 6433 df-fv 6434 df-riota 7224 df-ov 7270 df-oprab 7271 df-mpo 7272 df-om 7703 df-1st 7820 df-2nd 7821 df-frecs 8084 df-wrecs 8115 df-recs 8189 df-rdg 8228 df-er 8485 df-en 8721 df-dom 8722 df-sdom 8723 df-pnf 11021 df-mnf 11022 df-xr 11023 df-ltxr 11024 df-le 11025 df-sub 11217 df-neg 11218 df-nn 11984 df-n0 12244 df-z 12330 df-uz 12593 df-fz 13250 |
This theorem is referenced by: submat1n 31763 submatres 31764 madjusmdetlem1 31785 madjusmdetlem2 31786 madjusmdetlem3 31787 |
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