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15
Math.TechQA.Club
2013-09-03 04:07:14
248
Views
Down-set closure of subsets
Published on
03 Sep 2013 - 4:07
#elementary-set-theory
#relations
#order-theory
198
Views
Are there any nontrivial doubly-well-ordered sets?
Published on
03 Apr 2026 - 3:42
#elementary-set-theory
#order-theory
#ordinals
148
Views
Question about suprema/infima of partially ordered subsets
Published on
03 Sep 2013 - 17:00
#elementary-set-theory
#relations
#order-theory
657
Views
Order-reversing bijection on partially ordered sets
Published on
04 Sep 2013 - 16:14
#elementary-set-theory
#order-theory
3.3k
Views
Ordering the field of real rational functions
Published on
26 Mar 2026 - 14:42
#relations
#order-theory
#proof-verification
#ordered-fields
402
Views
Where can I learn more about order-reflecting functions? And is the following result well-known?
Published on
05 Sep 2013 - 11:58
#reference-request
#category-theory
#order-theory
101
Views
Help with elementary question involving a partially ordered set.
Published on
01 Apr 2026 - 6:52
#discrete-mathematics
#order-theory
#lattice-orders
143
Views
Finitely many minimal elements
Published on
08 Sep 2013 - 22:00
#relations
#order-theory
1.7k
Views
In a complete lattice every monotone function has a fixpoint (Knaster–Tarski Theorem)
Published on
07 Apr 2026 - 21:17
#order-theory
#lattice-orders
#fixed-point-theorems
869
Views
Proving well ordering is total relation
Published on
12 Sep 2013 - 6:41
#relations
#order-theory
2.1k
Views
Partial order relation
Published on
14 Sep 2013 - 8:20
#logic
#notation
#definition
#relations
#order-theory
384
Views
Equality and order in sets
Published on
14 Sep 2013 - 14:27
#real-analysis
#elementary-set-theory
#logic
#intuition
#order-theory
2.8k
Views
Is convex set interval or ray?
Published on
14 Sep 2013 - 19:07
#general-topology
#order-theory
110
Views
Are ideals of an sup semilattice always non-empty?
Published on
01 Apr 2026 - 10:32
#abstract-algebra
#order-theory
#lattice-orders
21.4k
Views
Prove that $\sup(A+B) = \sup(A) + \sup(B)$ and why does $\sup(A+B)$ exist?
Published on
15 Sep 2013 - 16:03
#real-analysis
#proof-writing
#order-theory
#alternative-proof
#solution-verification
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