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Examples-counterexamples
New post in Examples-counterexamples
Convergent sequence of irrational numbers that has a rational limit.
August 1st, 2022
irrational-numbers
sequences-and-series
examples-counterexamples
real-analysis
Examples of rings with idempotent elements
August 1st, 2022
examples-counterexamples
ring-theory
abstract-algebra
Give an example of non-normal subspace of a normal space.
August 1st, 2022
general-topology
examples-counterexamples
separation-axioms
Continuous partials at a point but not differentiable there?
August 1st, 2022
real-analysis
analysis
multivariable-calculus
examples-counterexamples
Sum of Cauchy Sequences Cauchy?
August 1st, 2022
topological-groups
examples-counterexamples
metric-spaces
Separately continuous functions that are discontinuous at every point
August 1st, 2022
general-topology
continuity
examples-counterexamples
Fibrations with isomorphic fibers, but not Zariski locally trivial
August 1st, 2022
algebraic-geometry
examples-counterexamples
Difference between flow and solution of ODE
August 1st, 2022
ordinary-differential-equations
examples-counterexamples
terminology
Is the sum of singular and nonsingular matrix always a nonsingular matrix?
June 23rd, 2020
examples-counterexamples
linear-algebra
matrices
Two variable limits via paths - are there pathalogical examples?
August 6th, 2022
calculus
real-analysis
reference-request
limits
examples-counterexamples
Can someone explain and give brief examples of centralizer and normalizer?
August 1st, 2022
abstract-algebra
examples-counterexamples
group-theory
Opposite of a contraction mapping
December 30th, 2020
real-analysis
metric-spaces
fixed-point-theorems
examples-counterexamples
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