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15
Math.TechQA.Club
2026-04-06 11:37:34
4k
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Prove that for any infinite poset there is an infinite subset which is either linearly ordered or antichain.
Published on
06 Apr 2026 - 11:37
#elementary-set-theory
#order-theory
#axiom-of-choice
2.7k
Views
Are ideals in rings and lattices related?
Published on
10 Apr 2026 - 19:12
#ring-theory
#order-theory
#ideals
#lattice-orders
150
Views
About function inj, surj and something else. Is this exercise resolved correctly?
Published on
10 Apr 2026 - 21:39
#functions
#order-theory
#relations
255
Views
A poset that's the union of the lower sets
Published on
02 Apr 2026 - 6:24
#terminology
#order-theory
#lattice-orders
1.2k
Views
Does the set $\mathbb{Z}$ satisfy the completeness axiom?
Published on
10 Apr 2026 - 10:34
#real-analysis
#elementary-set-theory
#order-theory
454
Views
How to prove if an infinite set is total ordered?
Published on
10 Apr 2026 - 8:59
#order-theory
#applications
4.1k
Views
Examples of Galois connections?
Published on
12 Apr 2026 - 10:35
#galois-theory
#order-theory
158
Views
Question on order ideals
Published on
11 Apr 2026 - 2:40
#general-topology
#order-theory
#lattice-orders
193
Views
Completeness of a poset
Published on
12 Apr 2026 - 5:48
#order-theory
208
Views
Partial functions and fixed points
Published on
09 Apr 2026 - 22:34
#elementary-set-theory
#order-theory
3.2k
Views
Rudin Theorem $1.11$
Published on
04 Apr 2026 - 0:12
#real-analysis
#analysis
#order-theory
#supremum-and-infimum
#upper-lower-bounds
786
Views
Is there an element with no fixed point and of infinite order in $\operatorname{Sym}(X)$ for $X$ infinite?
Published on
04 Apr 2026 - 12:18
#order-theory
#axiom-of-choice
#ordinals
#symmetric-groups
97
Views
Does there exist an ordered field where only addition preserves positivity?
Published on
12 Apr 2026 - 9:52
#abstract-algebra
#order-theory
1.6k
Views
A question regarding the Continuum Hypothesis (Revised)
Published on
12 Apr 2026 - 12:28
#set-theory
#order-theory
#forcing
619
Views
Cofinal subset and maximal elements in a poset
Published on
30 Jan 2012 - 1:39
#order-theory
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