0123N356N78
1
Name:
T512Y3
2012-03-21 5:27
01I73E35T5H5R3E5A511
2
Name:
Anonymous
2012-03-22 11:03
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3
Name:
Anonymous
2013-08-31 7:06
There is a transfinite sequence of cardinal numbers:
0, 1, 2, 3, ..., n ; ℵ0 , ℵ0 , ℵ1 , ... ℵα , ...
4
Name:
Anonymous
2013-08-31 7:33
rァー-r-、 _
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5
Name:
Anonymous
2013-08-31 7:51
(κ ≤ μ) → (κν ≤ μν ).
6
Name:
Anonymous
2013-08-31 8:37
It is therefore assumed by physicists that no measurable quantity could have an infinite value, for instance by taking an infinite value in an extended real number system, or by requiring the counting of an infinite number of events.
7
Name:
Anonymous
2013-08-31 8:57
, -ァ-、 r 、 \ フ_ -‐ァ
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/  ̄|\_/ ̄|::/-─|/\__∧
く.____/:::::|____」--─<´ `∨
/  ̄/ ヽ、 ':、
_/、 ./ \/::`ヽ.
,. <´:::::::::>'´ ヽ::::::::;ハ
/:::::::::>'"´ Y´:::::|
8
Name:
Anonymous
2013-08-31 9:23
Each set in this hierarchy is assigned (by transfinite recursion) an ordinal number α, known as its rank. The rank of a pure set X is defined to be the least upper bound of all successors of ranks of members of X.
9
Name:
Anonymous
2013-08-31 10:07
Many discussions of "classes" in the 19th century and earlier are really referring to sets, or perhaps to a more ambiguous concept.
10
Name:
Anonymous
2013-08-31 10:22
__,.、__,.、_
_r'"7_,.!-‐'-.、7-、_
r´ >'"  ̄`ヾ!、
rゝ'´/ /i. i 、 Y
. /| /Y ./ /メ、ハ /| ハ |
|| / ノ/! イ ○ レ' レ_,. レ'ヽ,ゝ
r'-'┐/ _,ノ ノ| " O |ソ| /|
`l^ヽ、ヘ⌒ヽr,ヘ. /´`ヽ "从 ', / .|
ヽ、_ノ7 (Y,/」>!、_,/_,. イノヘ〉r//
`ー-∠ト、7:::|/ムヽノ:::i´`7"´__ン、>
ノ\_rヘく:::::::::::ハ::::::::/-‐' ̄
r'ア'"::::`''ーァ二ニ=-、イ、7
ノ7:::::/::::::::/|} ノ/⌒ヽ>、
}」/::::::::::::/:::}|___,ンi二二!-'
iヽ、_:::__ンニ='-‐=-'!、__.ノ
`7二`/´
〈__ン
メイド・サーヴァント
超量産型 M S "サクやさん"
サクサク増殖する!
能力が低いのでサクサクやられるけど
生産性を活かして数で勝負だ!
11
Name:
Anonymous
2013-08-31 10:52
But some subsets of the real numbers do not have least elements. For example, the open interval (0,1) does not have a least element: if x is in (0,1), then so is x/2, and x/2 is always strictly smaller than x. So this attempt also fails.
12
Name:
Anonymous
2013-08-31 11:48
ト、 __,,,,.....,,,__
/ !'"´ ___ `゙' 、
./ , ''"´ ̄ ̄/`ヽ=-、 `'ー-‐ァ
/ / (`'´)k'
; ./ / ./ } 、 `'´八>
./{/l / -/-/ | ハ ; \
/| | |r;テ=r-、 ! ,:' }- | } r‐-ヽ
, ' ; ノ | ゝ-┴ |/ rテr ! ,' ;
/ /∠ ヘ. '、xx ヾl!// /
.{ ∠、 i ト、.,_,,.> xイl|/`ヽ
'、 ) 、 '、 `ヽ、 ´ 人ハ´ }
\(/ \ } \ } >‐ァ<´| ノ /
`ヽ. ,> ' ∨、 / ト 、 ノ-イ /
r<ヽヽ \ ン' \ ト‐'´
./´ \\ヽ ム }r'ヽ
_,! ∨}ヽr-‐ァ(`'´)くl } ̄`ヽ , -,
, '"´ /|. ∨ ̄ `Y _ハ ム ノ r 、 .,:' ./
.{ / .; } },.'´_`ヽ}-‐'' } } / ./_
'、 r' ;、 ({く弋ノ .>}\ _{ ヽ/´/ヽ
`7 ム゙ ゝ、,__,.ノl `「 ゝ、 l_/_/ノ
13
Name:
Anonymous
2013-08-31 17:32
rァー-r-、 _
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}ハ::::::':、::::::!}-ァ':::::;:イ-!
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/ rァ'":::::rン'"´`' ー、>;:::ヽ!ヽ.
.,.' r'」__r7'´ ',ヽ;::_ン ':,
/ / /_ ,.' ハ ! ; 、 `ヽ.
,' r7' ,' /_メ、._! /! ,' ,ハ ', ':,
i iンi. i ァ'-、`ヽ!_/ ,'_/!_ィ' i. ', ',
ノ r7::::/!___,,.!イト、 .j ´ァ'、ヽ! / i _,! ,.-、_
,' iソ::::/」 ハ. ゝ-' !_ソ,ノ7ーr 、ハ/ / ,' , `ヽ、
r/::::/r'! ',''" ' .,., ! ';ヽ.、 iゝ'、/ / `i
r'/;;::イノ ', 丶、 ー ノ i::::::Yi ヽ、)、,'_,r !
iY´ヽ、 ヽ、, ',>,、.,_ ,,. イ´,' ハ::::::!{ `',ー=-=7 ミ
rソ:!} `ヽ、.,____ `ヽ. ',ヽ、__「、 ノ / /r7:::/」 r!:::::::;:イヽ.
/:::::!{ ソァ'"´`ヽ、 Yイ/,,.'イ‐-'、:;/,ソ ソ ̄ ヽ!:::i}、
`ヽrノ ,.イ ,. -‐-..、, `ヽ、!_/イ ゝ、_:::`i7ー---‐ァ' ト、;:ゞ
く ァ'::::::::::::::::::ヽ. }>riく{ヽ ヽ!、:::ヽ!. / ハ/
`7::::::::::::::::::::::::Y! !ァ'⌒)::\. Y:::::!}----─‐ '" }|:::|{
,r〈::::::::::::::::::::::::::';ヽ, ( r':::::_,.-'、|} 彡 {!:::|}
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`´ヽ. ヽ;::::::>ノ i
,!\ ,.ゝ''"´ _,,..イ、
,.rイ::::/::ヽ. ,,.イ´::::::ン>ヽ.
/)ヘ:::;'::::::::::`':ー-::''´::::::';:::イ:::く \
14
Name:
Anonymous
2013-08-31 18:58
, -ァ-、 r 、 \ フ_ -‐ァ
|\ _/ く_ ハr、ハ \ <  ̄/
r-\|'"´ \|_|/, r‐┘ | | `ー `ー‐‐'
/ ̄\ア `ヽ. ト、 /
/ r/|´ / , | ,ハ.| | \ < ー┼‐ -─ァヽヽ. |___ |`l
,' /7 ./ メ_/| /イ|./ | | ,ハ \. ー┼‐ / _| .|/
| ./ |' ,レ'ィ´,ハ` レ' lリ∨.| |. | | _ (_|`ヽ `ー- (_ノ`ヽ O
| ' / r八ゝ-゚ __' ゙|/ .!/ / , - 、 ヽ
| / ヽ、 `.ハ" / ヽ|/ ハ / / l |  ̄`Y´ ̄ ̄`Y´ ̄ ̄
'、 | )ノ\ ト 、!_/ /-〈__ /
\ヽ. /´ ̄r7 /|\ {l , `ヽ /
)ノ 〈 }|ヽ.//ヽヘ ∨!-/ /
// ヽ.,_/| Y\/ .|::| }' / / /7 []┐
/ .| ム」イ //:! r'7 |‐┐ // 「l└'
! / \ く/|.」 ┴|_r- '‐┘ く/ | |
レ' / / `ヽ.___/イ> 、 |.」 [] [] /|
/ .レ'´ /二7_! ̄|:::::|_|\ r_/
| !__/ r|_/:::::::|/| ̄|:::::| /ヽ.
ヽ.,__ /::::::/  ̄|:::::|__/ ̄.! /:::::::::':,
/  ̄|\_/ ̄|::/-─|/\__∧
く.____/:::::|____」--─<´ `∨
/  ̄/ ヽ、 ':、
_/、 ./ \/::`ヽ.
,. <´:::::::::>'´ ヽ::::::::;ハ
/:::::::::>'"´ Y´:::::|
15
Name:
Anonymous
2013-08-31 19:33
In 1910, Zermelo left Göttingen upon being appointed to the chair of mathematics at Zurich University, which he resigned in 1916. He was appointed to an honorary chair at Freiburg im Breisgau in 1926, which he resigned in 1935 because he disapproved of Hitler's regime. At the end of World War II and at his request, Zermelo was reinstated to his honorary position in Freiburg.
16
Name:
Anonymous
2013-08-31 20:13
rァー-r-、 _
[7::::::/ソ`ヽ rソ´;ゝ,
}ハ::::::':、::::::!}-ァ':::::;:イ-!
,. '"´)ゝ、::::;:>'、::::;:イ:::i_7
/ rァ'":::::rン'"´`' ー、>;:::ヽ!ヽ.
.,.' r'」__r7'´ ',ヽ;::_ン ':,
/ / /_ ,.' ハ ! ; 、 `ヽ.
,' r7' ,' /_メ、._! /! ,' ,ハ ', ':,
i iンi. i ァ'-、`ヽ!_/ ,'_/!_ィ' i. ', ',
ノ r7::::/!___,,.!イト、 .j ´ァ'、ヽ! / i _,! ,.-、_
,' iソ::::/」 ハ. ゝ-' !_ソ,ノ7ーr 、ハ/ / ,' , `ヽ、
r/::::/r'! ',''" ' .,., ! ';ヽ.、 iゝ'、/ / `i
r'/;;::イノ ', 丶、 ー ノ i::::::Yi ヽ、)、,'_,r !
iY´ヽ、 ヽ、, ',>,、.,_ ,,. イ´,' ハ::::::!{ `',ー=-=7 ミ
rソ:!} `ヽ、.,____ `ヽ. ',ヽ、__「、 ノ / /r7:::/」 r!:::::::;:イヽ.
/:::::!{ ソァ'"´`ヽ、 Yイ/,,.'イ‐-'、:;/,ソ ソ ̄ ヽ!:::i}、
`ヽrノ ,.イ ,. -‐-..、, `ヽ、!_/イ ゝ、_:::`i7ー---‐ァ' ト、;:ゞ
く ァ'::::::::::::::::::ヽ. }>riく{ヽ ヽ!、:::ヽ!. / ハ/
`7::::::::::::::::::::::::Y! !ァ'⌒)::\. Y:::::!}----─‐ '" }|:::|{
,r〈::::::::::::::::::::::::::';ヽ, ( r':::::_,.-'、|} 彡 {!:::|}
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`´ヽ. ヽ;::::::>ノ i
,!\ ,.ゝ''"´ _,,..イ、
,.rイ::::/::ヽ. ,,.イ´::::::ン>ヽ.
/)ヘ:::;'::::::::::`':ー-::''´::::::';:::イ:::く \
17
Name:
Anonymous
2013-08-31 20:18
If 1 ≤ μ, then 0μ = 0.
18
Name:
Anonymous
2013-08-31 21:03
Cardinal arithmetic can be used to show not only that the number of points in a real number line is equal to the number of points in any segment of that line, but that this is equal to the number of points on a plane and, indeed, in any finite-dimensional space.
19
Name:
Anonymous
2013-08-31 21:38
, -ァ-、 r 、 \ フ_ -‐ァ
|\ _/ く_ ハr、ハ \ <  ̄/
r-\|'"´ \|_|/, r‐┘ | | `ー `ー‐‐'
/ ̄\ア `ヽ. ト、 /
/ r/|´ / , | ,ハ.| | \ < ー┼‐ -─ァヽヽ. |___ |`l
,' /7 ./ メ_/| /イ|./ | | ,ハ \. ー┼‐ / _| .|/
| ./ |' ,レ'ィ´,ハ` レ' lリ∨.| |. | | _ (_|`ヽ `ー- (_ノ`ヽ O
| ' / r八ゝ-゚ __' ゙|/ .!/ / , - 、 ヽ
| / ヽ、 `.ハ" / ヽ|/ ハ / / l |  ̄`Y´ ̄ ̄`Y´ ̄ ̄
'、 | )ノ\ ト 、!_/ /-〈__ /
\ヽ. /´ ̄r7 /|\ {l , `ヽ /
)ノ 〈 }|ヽ.//ヽヘ ∨!-/ /
// ヽ.,_/| Y\/ .|::| }' / / /7 []┐
/ .| ム」イ //:! r'7 |‐┐ // 「l└'
! / \ く/|.」 ┴|_r- '‐┘ く/ | |
レ' / / `ヽ.___/イ> 、 |.」 [] [] /|
/ .レ'´ /二7_! ̄|:::::|_|\ r_/
| !__/ r|_/:::::::|/| ̄|:::::| /ヽ.
ヽ.,__ /::::::/  ̄|:::::|__/ ̄.! /:::::::::':,
/  ̄|\_/ ̄|::/-─|/\__∧
く.____/:::::|____」--─<´ `∨
/  ̄/ ヽ、 ':、
_/、 ./ \/::`ヽ.
,. <´:::::::::>'´ ヽ::::::::;ハ
/:::::::::>'"´ Y´:::::|
20
Name:
Anonymous
2013-08-31 21:48
Set difference of U and A, denoted U \ A, is the set of all members of U that are not members of A. The set difference {1,2,3} \ {2,3,4} is {1} , while, conversely, the set difference {2,3,4} \ {1,2,3} is {4} . When A is a subset of U, the set difference U \ A is also called the complement of A in U. In this case, if the choice of U is clear from the context, the notation Ac is sometimes used instead of U \ A, particularly if U is a universal set as in the study of Venn diagrams.
21
Name:
Anonymous
2013-08-31 22:33
Category theorists have proposed topos theory as an alternative to traditional axiomatic set theory. Topos theory can interpret various alternatives to that theory, such as constructivism, finite set theory, and computable set theory.
22
Name:
Anonymous
2013-08-31 23:04
__,.、__,.、_
_r'"7_,.!-‐'-.、7-、_
r´ >'"  ̄`ヾ!、
rゝ'´/ /i. i 、 Y
. /| /Y ./ /メ、ハ /| ハ |
|| / ノ/! イ ○ レ' レ_,. レ'ヽ,ゝ
r'-'┐/ _,ノ ノ| " O |ソ| /|
`l^ヽ、ヘ⌒ヽr,ヘ. /´`ヽ "从 ', / .|
ヽ、_ノ7 (Y,/」>!、_,/_,. イノヘ〉r//
`ー-∠ト、7:::|/ムヽノ:::i´`7"´__ン、>
ノ\_rヘく:::::::::::ハ::::::::/-‐' ̄
r'ア'"::::`''ーァ二ニ=-、イ、7
ノ7:::::/::::::::/|} ノ/⌒ヽ>、
}」/::::::::::::/:::}|___,ンi二二!-'
iヽ、_:::__ンニ='-‐=-'!、__.ノ
`7二`/´
〈__ン
メイド・サーヴァント
超量産型 M S "サクやさん"
サクサク増殖する!
能力が低いのでサクサクやられるけど
生産性を活かして数で勝負だ!
23
Name:
Anonymous
2013-08-31 23:18
In general, it is impossible to prove that F exists without the axiom of choice, but this seems to have gone unnoticed until Zermelo.
24
Name:
Anonymous
2013-09-01 0:03
Tukey's lemma: Every non-empty collection of finite character has a maximal element with respect to inclusion.
25
Name:
Anonymous
2013-09-01 0:29
ト、 __,,,,.....,,,__
/ !'"´ ___ `゙' 、
./ , ''"´ ̄ ̄/`ヽ=-、 `'ー-‐ァ
/ / (`'´)k'
; ./ / ./ } 、 `'´八>
./{/l / -/-/ | ハ ; \
/| | |r;テ=r-、 ! ,:' }- | } r‐-ヽ
, ' ; ノ | ゝ-┴ |/ rテr ! ,' ;
/ /∠ ヘ. '、xx ヾl!// /
.{ ∠、 i ト、.,_,,.> xイl|/`ヽ
'、 ) 、 '、 `ヽ、 ´ 人ハ´ }
\(/ \ } \ } >‐ァ<´| ノ /
`ヽ. ,> ' ∨、 / ト 、 ノ-イ /
r<ヽヽ \ ン' \ ト‐'´
./´ \\ヽ ム }r'ヽ
_,! ∨}ヽr-‐ァ(`'´)くl } ̄`ヽ , -,
, '"´ /|. ∨ ̄ `Y _ハ ム ノ r 、 .,:' ./
.{ / .; } },.'´_`ヽ}-‐'' } } / ./_
'、 r' ;、 ({く弋ノ .>}\ _{ ヽ/´/ヽ
`7 ム゙ ゝ、,__,.ノl `「 ゝ、 l_/_/ノ
26
Name:
Anonymous
2013-09-01 0:49
There exists a model of ZF¬C in which there is a vector space with two bases of different cardinalities.
27
Name:
Anonymous
2013-09-01 1:34
retraction if a right inverse of f exists, i.e. if there exists a morphism g : b → a with fg = 1b.
28
Name:
Anonymous
2013-09-01 1:54
__ /「|、
「| ̄\__ ,.::'"´::::::::::`ヽ. / ヽ\
r'/ \ `ヽァ':::_;;:: -─-< \\
|_| \ >''"´:::::::::::::::::::::::::::::`'< \\
| | ,.:'"::/:::::::::/:::::|::::::::::::';::::ヽ;:::`:..、 |__|
|_| /:::::::;'::::/::::::/|:::::;|::ト、::::、|_:ハ:::::::::ヽ. / / 博麗ちゃんは
| | ,':::::::::|:::::!-‐ァ'T´/|::| ヽ:」__/`|::::::::|::ハ /_/ 生まれつき地元民の信仰が薄く
|_| .|::::::::::|:::::|:::/ _」/ |_| ´,.‐-、`ヽ;::/:::::| .| | 異変解決の度に維持費が不足していきます
',ハ |::::::::::|:::::|:ア,..‐、 |{。,ハ oY○::/ !__|
\∧:::::::;!::::;〈 |{。ハ ゝ‐゚'xw.!:::レ'| / ∧ 黒字化には1000円という
'、|\/レヘ| oゝ‐゚' , |ニ{´ ̄ \ | 莫大なお賽銭が必要です
|/ ○;ハxw _,,... - 、 /:::::| \ どうか協力をよろしくお願いします
/ ∧::::::ヘ、 l/´ ソ/;:::::;ハ_r─-、_,>┐
rく ,ハ:::::|:::`7ァーr--‐<´/ |:::/::/ `ヽ‐、_..]┘
\\_r'__/',:::;'<ヽ \_ _/ .レ'|:::| ト、∨
ヽ-r-‐'::∨、::::\ヽ \/ /:r'__,ノ /|
.|:::/|:::/ \:::::\\/{__}、 //::::| _ ./
レ' r八 ,ハ:::::::\/ |∨´::::| __ \
〈└-`'" ノ\:::/ | ',::::::/ \‐-、,.ヘ.
\-‐ /´ヽ-、 |::r|_/ , `Y::! ト、
/ヽ r/ rノエY{:::ヽ-〈_/ ,. |:::| | \
29
Name:
Anonymous
2013-09-01 2:19
A split monomorphism h : X → Y is a monomorphism having a left inverse g : Y → X, so that g ∘ h = idX. Thus h ∘ g : Y → Y is idempotent, so that (h ∘ g)2 = h ∘ g.
30
Name:
Anonymous
2013-09-01 3:05
Doing these constructions pointwise gives covariant and contravariant functors from the category of pointed differentiable manifolds to the category of real vector spaces.
31
Name:
Anonymous
2013-09-01 3:20
ヽ、 _,;:.ゝ|、____|___;;;:::-─ヽン‐r┐ | |)
くーヽ、:;___;;::-:::::::─::::'':::"´:[l:::|. |_|-、
';:::::::::::::i:::::::l]:::::l]::;:=、___;;:::::」、 i´:::::::::|_
/`"' ー-'--─ ''"7::::::ヽ. i `ヽ. r!__;;::-''|'
,' / ハ,__ i:::::::::i -!、ハ ', `i::::::::::::|_______________
.i ./ ,' /'´| ハ::::::ハ__ハ | i | !、__:/
|. i イ /,ア;ニ;ヽ V .オ`i`i | ,ハノ /
|. ', i ,〈 .ト | トノ.ノ レ'! | それでは最初のお便り
.| ヽ、ヘレ| ゝ' , ,,|:::| | < 某神社にお住まいのミコミコさん
| i |ヽ|:::|" ,. -‐ァ ,.イ:::| | |
| | |:::|ヽ.、, i _ノ / |;:::!-'‐' 7 .| 「キュウリに蜂蜜をかけて食べると
.| | |::::ト、, `,7T"i´ヽ!/´ / | メロンっぽい味になるのよ」
| | ,.ヘ!:::::|:::::`ヽ」ヽ、! / ./ ',
| !/ ヽ、|へノ::ヽム::_/ / ヽ、.,_________________
| ./ Yヽ、/:::/´└'"´`i /ヽ
|〈 〉:::::::7 ノ' ノ、
',くゝ、 、 イゝ:::::/ ァ''"イ_r'´ヽ〉
32
Name:
Anonymous
2013-09-01 9:55
The modern study of set theory was initiated by Georg Cantor and Richard Dedekind in the 1870s. After the discovery of paradoxes in naive set theory, numerous axiom systems were proposed in the early twentieth century, of which the Zermelo–Fraenkel axioms, with the axiom of choice, are the best-known.
33
Name:
Anonymous
2013-09-01 10:41
κ·0 = 0·κ = 0.
34
Name:
Anonymous
2013-09-01 11:26
Adding algebraic properties to this gives us the extended real numbers. We can also treat +\infty and -\infty as the same, leading to the one-point compactification of the real numbers, which is the real projective line. Projective geometry also introduces a line at infinity in plane geometry, and so forth for higher dimensions.