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furry -rating:g

Artist

  • ? shitacemayo 504

Copyright

  • ? touhou 991k

Character

  • ? kamishirasawa keine 17k

General

  • ? 1girl 7.2M
  • ? :d 666k
  • ? black shoes 221k
  • ? blue dress 154k
  • ? blue hair 1.0M
  • ? blue hat 66k
  • ? bobby socks 11k
  • ? book 166k
  • ? border 196k
  • ? bow 1.4M
  • ? breasts 4.2M
  • ? bright pupils 116k
  • ? chalkboard 12k
  • ? classroom 22k
  • ? cleavage 1.2M
  • ? dated 230k
  • ? dress 1.6M
  • ? footwear bow 10k
  • ? full body 1.1M
  • ? hat 1.5M
  • ? holding 1.8M
  • ? holding book 59k
  • ? holding pointer 934
  • ? indoors 463k
  • ? long hair 5.3M
  • ? looking at viewer 4.1M
  • ? math 1.3k
  • ? neckerchief 216k
  • ? open mouth 2.9M
  • ? pointer 2.8k
  • ? puffy short sleeves 218k
  • ? puffy sleeves 442k
  • ? red bow 268k
  • ? red eyes 1.5M
  • ? red neckerchief 64k
  • ? shoes 711k
  • ? short sleeves 773k
  • ? smile 3.5M
  • ? socks 494k
  • ? solo 6.0M
  • ? standing 1.1M
  • ? teacher 5.9k
  • ? twitter username 356k
  • ? white border 124k
  • ? white pupils 93k
  • ? white socks 183k
  • ? wooden floor 35k

Meta

  • ? commentary 2.2M
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  • ? translated 607k

Information

  • ID: 4643172
  • Uploader: Below273 »
  • Date: over 4 years ago
  • Size: 333 KB .jpg (1668x2224) »
  • Source: twitter.com/shitace1/status/1416043036644036611 »
  • Rating: General
  • Score: 25
  • Favorites: 33
  • Status: Active

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Resized to 50% of original (view original)
kamishirasawa keine (touhou) drawn by shitacemayo

Artist's commentary

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  • シンプルに慧音先生

    Simply Keine-sensei

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    NNescio
    over 4 years ago
    [hidden]

    The reason why they picked 3.05 and not 3 is to stymie people trying to go for the easy solution involving an inscribed hexagon.

    The textbook answer is to use an inscribed dodecagon (12-gon).

    The elegant answer (using pure geometry) is to use an inscribed decagon (10-gon), since it's the smallest n-gon you'll need and also has beautiful golden ratios.

    The most 'elegant' answer is to use the 1968 Putnam integral. Though this might be a bit overkill and relies on more recent mathematical developments (i.e. calculus, not just geometry). But it is very, very beautiful and succinct.

    They are also lot of other possible proofs, some more elegant than the others, and some downright cheeky. Though knowing the Baka Group they'll probably go for something like 𝜋 = 3.142... > 3.05, which doesn't count as a proof because it's tautological. And by "they" I mean Dai-chan. The rest will probably just go "wuhhh" or "Is pie tasty?"

    Updated by NNescio over 4 years ago

    21 Reply
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    Zaku Zelo
    over 4 years ago
    [hidden]

    NNescio said:

    The reason why they picked 3.05 and not 3 is to stymie people trying to go for the easy solution involving an inscribed hexagon.

    The textbook answer is to use an inscribed dodecahedron (12-gon).

    The elegant answer (using pure geometry) is to use an inscribed decahedron (10-gon), since it's the smallest n-gon you'll need and also has beautiful golden ratios.

    The most 'elegant' answer is to use the 1968 Putnam integral. Though this might be a bit overkill and relies on more recent mathematical developments (i.e. calculus, not just geometry). But it is very, very beautiful and succinct.

    They are also lot of other possible proofs, some more elegant than the others, and some downright cheeky. Though knowing the Baka Group they'll probably go for something like 𝜋 = 3.142... > 3.05, which doesn't count as a proof because it's tautological. And by "they" I mean Dai-chan. The rest will probably just go "wuhhh" or "Is pie tasty?"

    So basically what you're saying is I can't get in to Tokyo University.

    16 Reply
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    FWP
    over 4 years ago
    [hidden]

    School had accepted our (technical education) class answer of grabbing a measuring tape and measuring both the circumference and the diameter of the teacher's cup.

    Apparently not the first time our side of the education system used that bypass.

    8 Reply
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    ygm 1
    over 4 years ago
    [hidden]

    ...𝜋 = 3.142... > 3.05...

    Proof by Just Trust Me Bro

    9 Reply
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    NNescio
    over 4 years ago
    [hidden]

    ygm_1 said:

    Proof by Just Trust Me Bro

    Assume 𝜋 = 3.142
    ∴ 𝜋 > 3.05
    Q.E.D!

    5 Reply
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    Xinser
    over 4 years ago
    [hidden]

    You can say I'm Cirno in this comment section

    7 Reply
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    someguyted
    over 3 years ago
    [hidden]

    NNescio said:

    The reason why they picked 3.05 and not 3 is to stymie people trying to go for the easy solution involving an inscribed hexagon.

    The textbook answer is to use an inscribed dodecagon (12-gon).

    The elegant answer (using pure geometry) is to use an inscribed decagon (10-gon), since it's the smallest n-gon you'll need and also has beautiful golden ratios.

    The most 'elegant' answer is to use the 1968 Putnam integral. Though this might be a bit overkill and relies on more recent mathematical developments (i.e. calculus, not just geometry). But it is very, very beautiful and succinct.

    They are also lot of other possible proofs, some more elegant than the others, and some downright cheeky. Though knowing the Baka Group they'll probably go for something like 𝜋 = 3.142... > 3.05, which doesn't count as a proof because it's tautological. And by "they" I mean Dai-chan. The rest will probably just go "wuhhh" or "Is pie tasty?"

    I’m no math whiz, but I’m curious what would make a mathematical proof “cheeky”

    1 Reply
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    Kanzaku
    over 2 years ago
    [hidden]

    Xinser said:

    You can say I'm Cirno in this comment section

    Same

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    Problem
    Prove that 𝜋 is greater than 3.05.
    A common University of Tokyo entrance exam problem during the early 2000s.
    July 16
    Duty Roster
    Rumia Cirno
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