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LaGrangian's Theorem

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Post time 14-4-2009 10:15 PM | Show all posts |Read mode
Teorem LaGrange mengatakan setiap integer positif boleh ditulis sebagai jumlah 4 kuasa dua integer.

0 = 0^2 + 0^2 + 0^2 + 0^2

10 = 3^2 + 1^2 + 0^2 + 0^2

922 = 20^2 + 20^2 + 11^2 + 1^2

Rse2nye, nape ek?

btw, betul ke bende ni? hik3
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Post time 14-4-2009 11:03 PM | Show all posts

Balas #1 aku_EnSeM\ catat

Betoi ke ni Lagrangian? Tak silap aku lagrangian ni terangkan sistem dinamik dan banyak dipakai dalam mekanik klasik
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 Author| Post time 14-4-2009 11:41 PM | Show all posts
Originally posted by cepheid at 14-4-2009 11:03 PM
Betoi ke ni Lagrangian? Tak silap aku lagrangian ni terangkan sistem dinamik dan banyak dipakai dalam mekanik klasik


Betul.

la Grange buat banyak gile bende. Die mmg famous dlm mekanik, tapi ade satu lg bidang lain yg die hebat, generally dlm number theory. Salah satu sumbangan die adelah teorem tu.

Sape2 nk try pilih nombor, pastu tulis dlm bentuk jumlah 4 nombor kuasa dua.
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Post time 15-4-2009 12:02 AM | Show all posts

Balas #3 aku_EnSeM\ catat

Sorry aku baru teringat teorem ni dalam group theory. Lama tak buat math lupa dah
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 Author| Post time 15-4-2009 12:07 AM | Show all posts

Reply #4 cepheid's post

Tgh boring2 ni, aku bru je habis buat coding utk express 1 integer kpde jumlah 4 kuasa dua integer.

It works fine, and extremely fast. Nk improve sket algorithm supaye coding nmpk kemas sket.
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Post time 15-4-2009 12:16 AM | Show all posts

Balas #5 aku_EnSeM\ catat

Kalau takat code mcm ko nak buat tu tak sampai 1 min aku boleh buat
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 Author| Post time 15-4-2009 12:21 AM | Show all posts
Originally posted by cepheid at 15-4-2009 12:16 AM
Kalau takat code mcm ko nak buat tu tak sampai 1 min aku boleh buat


Ye ke...

Tunjuk sket, nk compare..
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Post time 15-4-2009 12:30 AM | Show all posts

Balas #7 aku_EnSeM\ catat

Skrg x leh buat le..aku kat opis tengah solve numerical problem ni. Jap lagi supervisor aku datang
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 Author| Post time 15-4-2009 12:36 AM | Show all posts

Reply #8 cepheid's post

alah, numerical problem tu masuk PC, tekan enter, siap...
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Post time 15-4-2009 12:38 AM | Show all posts

Balas #9 aku_EnSeM\ catat

aku buat coding sendiri bukan pakai software le....
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 Author| Post time 15-4-2009 12:40 AM | Show all posts

Reply #10 cepheid's post

coding senang sket dr buat rumus tu sendiri... g je google method ape2, pastu taip masuk C.
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Post time 15-4-2009 12:55 AM | Show all posts

Balas #11 aku_EnSeM\ catat

hahaha....well research aku pun bukan jenis mcm tu..lagipun aku tak pakai C tu language yang tak sesuai nak buat code yang beribu-ribu line
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 Author| Post time 15-4-2009 09:40 AM | Show all posts
BTW, back to the topic. Ade lg x teorem2 menarik yg cmni?
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Post time 15-5-2010 02:20 AM | Show all posts
Reply 1# aku_EnSeM


btol... mmg btol pun theorem ini... any given integer can be expressed as sum of 4 squares... sbb expression sedemikian x unique... so it is true for all positive integers...
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