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Mirrors > Home > MPE Home > Th. List > 1idssfct | Structured version Visualization version GIF version |
Description: The positive divisors of a positive integer include 1 and itself. (Contributed by Paul Chapman, 22-Jun-2011.) |
Ref | Expression |
---|---|
1idssfct | ⊢ (𝑁 ∈ ℕ → {1, 𝑁} ⊆ {𝑛 ∈ ℕ ∣ 𝑛 ∥ 𝑁}) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 1nn 11031 | . . 3 ⊢ 1 ∈ ℕ | |
2 | nnz 11399 | . . . 4 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ ℤ) | |
3 | 1dvds 14996 | . . . 4 ⊢ (𝑁 ∈ ℤ → 1 ∥ 𝑁) | |
4 | 2, 3 | syl 17 | . . 3 ⊢ (𝑁 ∈ ℕ → 1 ∥ 𝑁) |
5 | breq1 4656 | . . . . 5 ⊢ (𝑛 = 1 → (𝑛 ∥ 𝑁 ↔ 1 ∥ 𝑁)) | |
6 | 5 | elrab 3363 | . . . 4 ⊢ (1 ∈ {𝑛 ∈ ℕ ∣ 𝑛 ∥ 𝑁} ↔ (1 ∈ ℕ ∧ 1 ∥ 𝑁)) |
7 | 6 | biimpri 218 | . . 3 ⊢ ((1 ∈ ℕ ∧ 1 ∥ 𝑁) → 1 ∈ {𝑛 ∈ ℕ ∣ 𝑛 ∥ 𝑁}) |
8 | 1, 4, 7 | sylancr 695 | . 2 ⊢ (𝑁 ∈ ℕ → 1 ∈ {𝑛 ∈ ℕ ∣ 𝑛 ∥ 𝑁}) |
9 | iddvds 14995 | . . . 4 ⊢ (𝑁 ∈ ℤ → 𝑁 ∥ 𝑁) | |
10 | 2, 9 | syl 17 | . . 3 ⊢ (𝑁 ∈ ℕ → 𝑁 ∥ 𝑁) |
11 | breq1 4656 | . . . . 5 ⊢ (𝑛 = 𝑁 → (𝑛 ∥ 𝑁 ↔ 𝑁 ∥ 𝑁)) | |
12 | 11 | elrab 3363 | . . . 4 ⊢ (𝑁 ∈ {𝑛 ∈ ℕ ∣ 𝑛 ∥ 𝑁} ↔ (𝑁 ∈ ℕ ∧ 𝑁 ∥ 𝑁)) |
13 | 12 | biimpri 218 | . . 3 ⊢ ((𝑁 ∈ ℕ ∧ 𝑁 ∥ 𝑁) → 𝑁 ∈ {𝑛 ∈ ℕ ∣ 𝑛 ∥ 𝑁}) |
14 | 10, 13 | mpdan 702 | . 2 ⊢ (𝑁 ∈ ℕ → 𝑁 ∈ {𝑛 ∈ ℕ ∣ 𝑛 ∥ 𝑁}) |
15 | prssi 4353 | . 2 ⊢ ((1 ∈ {𝑛 ∈ ℕ ∣ 𝑛 ∥ 𝑁} ∧ 𝑁 ∈ {𝑛 ∈ ℕ ∣ 𝑛 ∥ 𝑁}) → {1, 𝑁} ⊆ {𝑛 ∈ ℕ ∣ 𝑛 ∥ 𝑁}) | |
16 | 8, 14, 15 | syl2anc 693 | 1 ⊢ (𝑁 ∈ ℕ → {1, 𝑁} ⊆ {𝑛 ∈ ℕ ∣ 𝑛 ∥ 𝑁}) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 384 ∈ wcel 1990 {crab 2916 ⊆ wss 3574 {cpr 4179 class class class wbr 4653 1c1 9937 ℕcn 11020 ℤcz 11377 ∥ cdvds 14983 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 ax-resscn 9993 ax-1cn 9994 ax-icn 9995 ax-addcl 9996 ax-addrcl 9997 ax-mulcl 9998 ax-mulrcl 9999 ax-mulcom 10000 ax-addass 10001 ax-mulass 10002 ax-distr 10003 ax-i2m1 10004 ax-1ne0 10005 ax-1rid 10006 ax-rnegex 10007 ax-rrecex 10008 ax-cnre 10009 ax-pre-lttri 10010 ax-pre-lttrn 10011 ax-pre-ltadd 10012 ax-pre-mulgt0 10013 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-nel 2898 df-ral 2917 df-rex 2918 df-reu 2919 df-rab 2921 df-v 3202 df-sbc 3436 df-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-pss 3590 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-tp 4182 df-op 4184 df-uni 4437 df-iun 4522 df-br 4654 df-opab 4713 df-mpt 4730 df-tr 4753 df-id 5024 df-eprel 5029 df-po 5035 df-so 5036 df-fr 5073 df-we 5075 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-pred 5680 df-ord 5726 df-on 5727 df-lim 5728 df-suc 5729 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 df-fv 5896 df-riota 6611 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-om 7066 df-wrecs 7407 df-recs 7468 df-rdg 7506 df-er 7742 df-en 7956 df-dom 7957 df-sdom 7958 df-pnf 10076 df-mnf 10077 df-xr 10078 df-ltxr 10079 df-le 10080 df-sub 10268 df-neg 10269 df-nn 11021 df-z 11378 df-dvds 14984 |
This theorem is referenced by: isprm2 15395 |
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