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Prove an upper bound for the determinant of a matrix A
August 1st, 2022
linear-algebra
matrices
determinant
Sum of ideals-Intersection of algebraic sets
January 22nd, 2020
abstract-algebra
ideals
How to tell the difference between interval and coordinate notation from context?
August 1st, 2022
discrete-mathematics
logic
real-numbers
Writing a composite transformation as a matrix multiplication
August 1st, 2022
matrices
transformation
Solving genereal zero sum games
August 1st, 2022
game-theory
Clarification: Is it true trace of $(A^TA)$ is induced matrix norm squared?
August 1st, 2022
real-analysis
linear-algebra
functional-analysis
vector-spaces
hilbert-spaces
Can somebody explain with one example the concepts: Lemma-Hypothesis-Theorem-Assumption-Proof-Axiom-Thesis-Determination-Definition-Proof
August 1st, 2022
reference-request
terminology
reference-works
Why do we seek real-valued solutions to second-order linear homogeneous ODEs when the characteristic equation has complex roots?
December 4th, 2020
ordinary-differential-equations
How to find the area enclosed by the ellipse $b^2x^2 + a^2y^2=a^2b^2$?
June 22nd, 2020
integration
conic-sections
area
Max and Min using Lagrange Multipliers
August 1st, 2022
matrices
optimization
lagrange-multiplier
constraints
Determine if the following function is one-to-one and/or onto
November 13th, 2020
linear-algebra
multivariable-calculus
transformation
HK is cyclic if H and K are both cyclic
December 25th, 2020
abstract-algebra
group-theory
finite-groups
normal-subgroups
proving a set is not path-connected
August 1st, 2022
analysis
Finding a basis for a complex lattice given a nondivisible vector in the lattice
August 1st, 2022
linear-algebra
abstract-algebra
complex-numbers
integer-lattices
Proof - There're infinitely many primes of the form 3k + 2 — origin of $3q_1..q_n + 2$
August 1st, 2022
elementary-number-theory
intuition
proof-verification
Orientation matrix for three points in the plane
June 2nd, 2020
linear-algebra
geometry
matrices
Finding extremas of a three variable function
August 1st, 2022
multivariable-calculus
Determine scale factor of an object given its distance from a viewer/camera
August 1st, 2022
geometry
transformation
Matrix inversion approach using gradient descent curve
August 1st, 2022
linear-algebra
matrices
multivariable-calculus
gradient-descent
Quotient of a local regular ring
August 20th, 2020
commutative-algebra
Why is Euler's totient function equal to (p-1)(q-1) when N=pq and p and q are prime?
August 1st, 2022
combinatorics
prime-numbers
arithmetic
totient-function
What is the notation for: for every element of a set of 2-tuples, the second element in each tuple is unique?
March 22nd, 2020
logic
elementary-set-theory
Gödel's Incompleteness Theorem - Diagonal Lemma
May 13th, 2020
logic
incompleteness
Linear equation is equal to a cubic equations, question about number of solutions?
August 1st, 2022
algebra-precalculus
Find coordinates of touching point of a tangent on a circle
August 1st, 2022
geometry
trigonometry
circles
Some expectation values for a Gamma distribution
August 1st, 2022
probability
gamma-function
probability-distributions
estimation-theory
Rank of a cohomology group, Betti numbers.
August 1st, 2022
group-theory
algebraic-topology
homological-algebra
homology-cohomology
topological-groups
Fundamental group of the quotient space of the disk obtained by identifying points on the boundary that are 120 degree aparts
October 4th, 2020
algebraic-topology
Symmetric group and commuting elements
January 29th, 2020
group-theory
finite-groups
symmetric-groups
Determining the symmetry of a plane algebraic curve from its Cartesian equation
August 1st, 2022
algebraic-geometry
plane-curves
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Recents
What age is too old for research advisor/professor?
How much solvent do you add for a 1:20 dilution, and why is it called 1 to 20?
How many weeks of holidays does a Ph.D. student in Germany have the right to take?
Why higher the binding energy per nucleon, more stable the nucleus is.?
What happen if the reviewer reject, but the editor give major revision?
Coordination number of 3D close packing
Why do universities check for plagiarism in student assignments with online content?
pKa = pH for strong acid — strong base?
Anonymous sites used to attack researchers. What to do about it?
Why does [Ni(gly)2] show optical isomerism despite having no chiral carbon?
I downoaded articles from libgen (didn't know was illegal) and it seems that advisor used them to publish his work
How do superwomen find time?
What is the chemical formula of ghee?
Masters in mathematics after bachelors in mechanical engineering
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Why energy is released when an electron is added to a neutral atom?
Time constant of $RC$ circuit with more than one capacitor
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Article waiting for AE assignment for too long?
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