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Order-theory
New post in Order-theory
Order-preserving function
October 9th, 2020
order-theory
abstract-algebra
functions
proof-verification
Understanding comparability in a partially ordered sets with Hasse diagrams
March 4th, 2020
relations
boolean-algebra
order-theory
graph-theory
elementary-set-theory
Number of linear extensions
August 1st, 2022
combinatorics
order-theory
discrete-mathematics
Lattices and Hasse diagrams
August 1st, 2020
order-theory
lattice-orders
Prove every finite lattice has a greatest element - without induction
August 1st, 2022
order-theory
lattice-orders
abstract-algebra
Every finite partially ordered set has a maximum length chain.
August 1st, 2022
set-theory
order-theory
Prove the principle of mathematical induction with the well ordering principle
August 1st, 2022
logic
induction
order-theory
Origin of min/max notation
February 8th, 2020
analysis
notation
order-theory
What is reverse inclusion?
August 1st, 2022
combinatorics
discrete-mathematics
order-theory
lattice-orders
Does the empty set have a minimum if it is a subset of R?
March 17th, 2020
real-numbers
order-theory
supremum-and-infimum
What is the difference between an Ordered Set and a Completely Ordered Set?
February 10th, 2020
definition
order-theory
Discrete Math - Hasse Diagrams
November 25th, 2020
discrete-mathematics
order-theory
Trouble understanding poset notation and Hasse Diagrams
March 6th, 2020
discrete-mathematics
order-theory
Uncountably many ordering of natural numbers
August 1st, 2022
order-theory
elementary-set-theory
How to prove a total order has a unique minimal element
August 1st, 2022
discrete-mathematics
order-theory
Definition of initial segment
August 1st, 2022
order-theory
definition
general-topology
real-analysis
Subset relation ⊆ on all subsets of ℤ is a partial order, not a total order.
August 1st, 2022
order-theory
proof-writing
elementary-set-theory
integers
Why in distributive lattices, if an element has complement, it is unique?
August 1st, 2022
lattice-orders
discrete-mathematics
logic
order-theory
prove that a partially ordered set of elements mn+1 has a chain of size m+1 or antichain of size n+1
September 26th, 2020
order-theory
combinatorics
Infimum and supremum of subset of inclusion Power set
August 1st, 2022
order-theory
relations
How many infima and suprema can there be?
October 10th, 2020
order-theory
elementary-set-theory
Check if a relation is a partial or total order and find minimum, maximum, minimal and maximal elements
August 1st, 2022
relations
order-theory
The number of partial orders of finite set.
February 13th, 2021
order-theory
Exercise: Every non-empty subset of $X$ contains a minimum and maximum element and the converse
January 11th, 2020
order-theory
self-learning
elementary-set-theory
Let $L$ and $L'$ be lattices. Prove that $L \times L'$ is also a lattice.
August 31st, 2020
proof-verification
order-theory
combinatorics
Order by inclusion
May 20th, 2020
order-theory
$A$ is the power set of set $C$, and $S$ is the relation on $A$ defined by $x S y$ iff $x \subseteq y$.
August 1st, 2022
order-theory
relations
Is reverse lexicographic order the same as graded reverse lexicographic order?
August 1st, 2022
terminology
order-theory
groebner-basis
monomial-ideals
monomial-order
Question about supremum $\implies$ infimum
August 1st, 2022
order-theory
real-analysis
ordered-fields
supremum-and-infimum
Q: Trichotomy of order of the real numbers
July 28th, 2020
order-theory
real-numbers
real-analysis
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