Danbooru
Login Posts Comments Notes Artists Tags Pools Wiki Forum More » Listing Upload Hot Changes Help

Search

Blacklisted (help)

  • guro
  • scat
  • furry -rating:g
Disable all Re-enable all

Artist

  • ? azel (laevateinn495) 168

Copyright

  • ? touhou 940k

Characters

  • ? flandre scarlet 54k
  • ? koakuma 15k
  • ? patchouli knowledge 35k

General

  • ? 3girls 265k
  • ? blonde hair 1.7M
  • ? blush stickers 116k
  • ? chibi 274k
  • ? educational 190
  • ? fang 357k
  • ? hair ribbon 657k
  • ? hat 1.3M
  • ? head wings 71k
  • ? long hair 4.8M
  • ? math 1.2k
  • ? multiple girls 1.7M
  • ? necktie 501k
  • ? purple eyes 906k
  • ? purple hair 719k
  • ? red eyes 1.4M
  • ? red hair 584k
  • ? ribbon 1.2M
  • ? stick 7.0k
  • ? teaching 390
  • ? text focus 18k
  • ? wings 480k

Meta

  • ? bad id 1.3M
  • ? ↳ bad pixiv id 981k
  • ? commentary request 3.6M
  • ? highres 6.0M
  • ? photoshop (medium) 707k
  • ? translation request 611k
  • ? ↳ partially translated 20k

Information

  • ID: 1053538
  • Uploader: henmere »
  • Date: over 13 years ago
  • Size: 429 KB .jpg (1296x1812) »
  • Source: pixiv.net/artworks/17211423 »
  • Rating: Sensitive
  • Score: 0
  • Favorites: 1
  • Status: Deleted

Options

  • Resize to window
  • View smaller
  • View original
  • Find similar
  • Download

History

  • Tags
  • Pools
  • Notes
  • Moderation
  • Commentary

This post was deleted for the following reason:

Unapproved in three days (over 13 years ago)
Resized to 65% of original (view original)
flandre scarlet, patchouli knowledge, and koakuma (touhou) drawn by azel_(laevateinn495)

Artist's commentary

  • Original
  • 例大祭新刊サンプル

    例大祭8新刊のサンプルです。
    表紙:pixiv #17173120 »
    中身は、東方のキャラクターが大真面目に解説をしている数学書です。
    誰得なのは気にしない方向で。

    • ‹ prev Search: user:henmere status:deleted next ›
    • « ‹ prev Pool: Touhou - Tutoring Flan-chan ~Elementary Number Theory~ (Fujii Tatsuya) next › »
  • Comments
  • There are no comments.

    *Since we are discussing the concept of divisibility, it is not necessary to take into account negative numbers. However, to make the concept of minimality well-defined, the rest of this book will discuss natural numbers only.
    [Definition 5.1] For any natural number greater than 2, the "non-trivial divisor" is defined as any divisor other than 1 and itself. If a natural number greater than 2 has 1 or more non-trivial divisors, it is a composite number. Otherwise, it is a prime number.
    Prime number
    The Ice Fairy at the lake said Prime numbers are "awesome numbers" and glossed it over!
    Is 9 a prime?
    You can't be deceived!
    Prime number
    Of course not!
    [Theorem 5.1] If a prime number p divides ab, then p divides either a or b. [Proof] (a, p) is a divisor of p, so it's either 1 or p. Two cases: 1. (a, p) = p, therefore p divides a, Q.E.D. 2. (a, p) = 1. Then with theorem 2.3, we can show that p divides b. Q.E.D.
    Terms / Privacy / Upgrade / Contact /