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@drtrefor
"What is a DIFFERENTIAL EQUATION Intro to my full ODE course"
YouTube Link @drtrefor 2021-01-13T18:13Z 541K followers, 363.3K engagements
"Negating Logical Statements with Multiple Quantifiers"
YouTube Link @drtrefor 2017-09-10T19:09Z 541K followers, 94.1K engagements
"Comparison Test for Improper Integrals"
YouTube Link @drtrefor 2019-01-30T14:18Z 541K followers, 184.4K engagements
"Geometric Meaning of the Gradient Vector"
YouTube Link @drtrefor 2020-06-21T15:45Z 541K followers, 260.5K engagements
"Why does the 5th Dimension have two axes of rotation"
YouTube Link @drtrefor 2025-10-08T15:36Z 541K followers, 22.4K engagements
"Reflexive Symmetric and Transitive Relations on a Set"
YouTube Link @drtrefor 2017-07-09T03:22Z 541K followers, 401K engagements
"Change of Variables & The Jacobian Multi-variable Integration"
YouTube Link @drtrefor 2019-12-18T20:53Z 541K followers, 381.8K engagements
"Power Series & Intervals of Convergence"
YouTube Link @drtrefor 2019-02-28T12:25Z 541K followers, 154.1K engagements
"Equations of Planes: Vector & Component Forms Multivariable Calculus"
YouTube Link @drtrefor 2019-08-25T16:08Z 541K followers, 172.3K engagements
"A unified view of Vector Calculus (Stoke's Theorem Divergence Theorem & Green's Theorem)"
YouTube Link @drtrefor 2020-12-18T16:40Z 542K followers, 137.1K engagements
"Intro to LaTeX Full Tutorial Part II (Equations Tables Figures Theorems Macros and more)"
YouTube Link @drtrefor 2021-08-10T16:06Z 541K followers, 289.2K engagements
"9 tips to help you PROVE MATH THEOREMS"
YouTube Link @drtrefor 2020-07-05T18:50Z 541K followers, 152.5K engagements
"Strange Attractors"
YouTube Link @drtrefor 2025-10-13T15:24Z 542K followers, 35.7K engagements
"Mechanical Vibrations: Underdamped vs Overdamped vs Critically Damped"
YouTube Link @drtrefor 2021-04-14T16:54Z 541K followers, 215.6K engagements
"Finding the scalar potential function for a conservative vector field // Vector Calculus"
YouTube Link @drtrefor 2020-11-16T17:12Z 541K followers, 149.4K engagements
"What are the big ideas of Multivariable Calculus Full Course Intro"
YouTube Link @drtrefor 2020-04-28T15:23Z 541K followers, 571.8K engagements
"Intro to the Laplace Transform & Three Examples"
YouTube Link @drtrefor 2020-03-15T19:37Z 541K followers, 1.1M engagements
"How to Compute a FOURIER SERIES // Formulas & Full Example"
YouTube Link @drtrefor 2021-05-06T15:39Z 541K followers, 471.9K engagements
"3 Properties of Laplace Transforms: Linearity Existence and Inverses"
YouTube Link @drtrefor 2020-03-17T18:51Z 541K followers, 173.5K engagements
"Markov Chains & Transition Matrices"
YouTube Link @drtrefor 2020-09-14T15:17Z 541K followers, 286.3K engagements
"Intro to Truth Tables Negation Conjunction and Disjunction"
YouTube Link @drtrefor 2017-05-16T20:37Z 541K followers, 318.1K engagements
"What eigenvalues and eigenvectors mean geometrically"
YouTube Link @drtrefor 2017-06-27T00:38Z 541K followers, 214.8K engagements
"Introducing Linear Combinations & Span"
YouTube Link @drtrefor 2018-05-16T19:20Z 541K followers, 88.2K engagements
"The Vector Space of Polynomials: Span Linear Independence and Basis"
YouTube Link @drtrefor 2020-07-12T13:37Z 541K followers, 169.4K engagements
"Double Integration in Polar Coordinates Example & Derivation"
YouTube Link @drtrefor 2019-12-08T20:14Z 541K followers, 154.6K engagements
"What is a LINE INTEGRAL // Big Idea Derivation & Formula"
YouTube Link @drtrefor 2020-09-21T16:22Z 541K followers, 325K engagements
"The Illusion of Thinking // The new Apple AI paper is.something"
YouTube Link @drtrefor 2025-06-11T16:45Z 541K followers, 51.7K engagements
"Flux Integrals // Big Idea Formula & Examples // Vector Calculus"
YouTube Link @drtrefor 2020-10-28T16:27Z 541K followers, 113.3K engagements
"What's the big idea of Linear Algebra Course Intro"
YouTube Link @drtrefor 2018-02-18T17:24Z 541K followers, 481.2K engagements
"How to Solve Constant Coefficient Homogeneous Differential Equations"
YouTube Link @drtrefor 2021-03-22T15:14Z 541K followers, 204.3K engagements
"Undetermined Coefficients: Solving non-homogeneous ODEs"
YouTube Link @drtrefor 2021-04-19T16:10Z 541K followers, 545.3K engagements
"Math News: The Bunkbed conjecture was just debunked"
YouTube Link @drtrefor 2024-10-09T16:07Z 541K followers, 307.4K engagements
"Proof by Contradiction Method & First Example"
YouTube Link @drtrefor 2017-06-13T14:30Z 541K followers, 264.6K engagements
"An infinite block overhang"
YouTube Link @drtrefor 2025-09-30T16:14Z 542K followers, 3.4M engagements
"Intro to VECTOR FIELDS // Sketching by hand & with computers"
YouTube Link @drtrefor 2020-10-11T15:08Z 541K followers, 146K engagements
"INTEREST: Simple Interest vs Compound Interest vs Continuous Interest"
YouTube Link @drtrefor 2021-06-01T18:36Z 541K followers, 73.9K engagements
"Divergence Flux and Green's Theorem // Vector Calculus"
YouTube Link @drtrefor 2020-11-18T16:28Z 541K followers, 97.4K engagements
"Intro to Conditional Probability"
YouTube Link @drtrefor 2017-11-19T00:46Z 541K followers, 1.6M engagements
"How Google designed a smarter calculator than Apple"
YouTube Link @drtrefor 2025-03-10T16:11Z 541K followers, 280.9K engagements
"Computing the Fourier Series of EVEN or ODD Functions full example"
YouTube Link @drtrefor 2021-05-09T15:43Z 541K followers, 182.7K engagements
"The MATH of Pandemics Intro to the SIR Model"
YouTube Link @drtrefor 2020-03-11T16:00Z 541K followers, 325.5K engagements
"Limits are.weird.for multi-variable functions Limits along paths"
YouTube Link @drtrefor 2019-11-05T18:56Z 541K followers, 146.2K engagements
"The Gaussian Integral // Solved Using Polar Coordinates"
YouTube Link @drtrefor 2020-07-26T15:17Z 541K followers, 134.7K engagements
"The Gradient Vector Field"
YouTube Link @drtrefor 2020-10-11T15:09Z 541K followers, 155.6K engagements
"Spherical Loaf of Bread"
YouTube Link @drtrefor 2025-05-07T15:52Z 541K followers, 431.6K engagements
"The Method of Integrating Factors for Linear 1st Order ODEs full example"
YouTube Link @drtrefor 2021-03-01T16:57Z 541K followers, 229.6K engagements
"Weird notions of "distance" Intro to Metric Spaces"
YouTube Link @drtrefor 2022-04-11T16:00Z 541K followers, 104K engagements
"Absolute Convergence vs Conditional Convergence vs Convergence"
YouTube Link @drtrefor 2019-02-22T12:20Z 541K followers, 46.8K engagements
"Two Conditional Probability Examples (what's the difference)"
YouTube Link @drtrefor 2017-11-19T00:58Z 541K followers, 253.4K engagements
"Conditional Statements: if p then q"
YouTube Link @drtrefor 2017-05-17T22:33Z 541K followers, 906.3K engagements
"Lagrange Multipliers with TWO constraints Multivariable Optimization"
YouTube Link @drtrefor 2020-06-28T18:34Z 541K followers, 86.6K engagements
"Directional Derivatives What's the slope in any direction"
YouTube Link @drtrefor 2019-11-17T17:56Z 541K followers, 245K engagements
"The best way to stack blocks"
YouTube Link @drtrefor 2025-10-05T17:47Z 542K followers, 126.9K engagements
"Change the order of integration to solve tricky integrals"
YouTube Link @drtrefor 2020-07-22T15:48Z 541K followers, 250.1K engagements
"This is the best way to stack blocks"
YouTube Link @drtrefor 2025-08-19T16:14Z 541K followers, 367.7K engagements
"Math News: The Fish Bone Conjecture has been deboned"
YouTube Link @drtrefor 2024-12-11T18:16Z 541K followers, 235.2K engagements
"All the TRIG you need for calculus actually explained"
YouTube Link @drtrefor 2024-09-11T16:07Z 541K followers, 283.7K engagements
"The Bernoulli Equation // Substitutions in Differential Equations"
YouTube Link @drtrefor 2021-03-08T15:49Z 541K followers, 212.6K engagements
"How curvy is a curve Intro to Curvature & Circles of Curvature Multi-variable Calculus"
YouTube Link @drtrefor 2019-10-20T16:50Z 541K followers, 111.5K engagements
"Intro to Gradient Descent Optimizing High-Dimensional Equations"
YouTube Link @drtrefor 2023-02-14T17:02Z 541K followers, 98.6K engagements
"The Key Definitions of Differential Equations: ODE order solution initial condition IVP"
YouTube Link @drtrefor 2021-01-20T18:10Z 541K followers, 133.9K engagements
"Intro to Linear Programming"
YouTube Link @drtrefor 2021-04-06T15:55Z 541K followers, 275.6K engagements
"This pattern appears everywhere in nature // Voronoi Cells"
YouTube Link @drtrefor 2025-09-14T16:10Z 541K followers, 260.9K engagements
"Equivalence Relations - Reflexive Symmetric and Transitive"
YouTube Link @drtrefor 2017-07-09T03:25Z 541K followers, 176.8K engagements
"Why does a 4pi rotation untwist the space but a 2pi rotation does not"
YouTube Link @drtrefor 2023-03-21T16:46Z 541K followers, 90.2K engagements
"What is XX Is X a natural number MATHEMATICIANS DISAGREE"
YouTube Link @drtrefor 2024-11-17T17:25Z 541K followers, 52K engagements
"Conditional Probability With Tables Chance of an Orange M&M"
YouTube Link @drtrefor 2019-04-08T19:17Z 541K followers, 83.2K engagements
"What is cos( cos( cos( cos( cos( cos( cos( cos( cos( cos( cos( cos( // Banach Fixed Point Theorem"
YouTube Link @drtrefor 2022-01-10T17:07Z 541K followers, 629.4K engagements
"Did I make a 4D bubble"
YouTube Link @drtrefor 2025-08-04T19:47Z 541K followers, 3.1M engagements
"Basic Tables in LaTeX #shorts"
YouTube Link @drtrefor 2022-11-27T19:30Z 541K followers, 76.3K engagements
"The Theory of 2nd Order ODEs // Existence & Uniqueness Superposition & Linear Independence"
YouTube Link @drtrefor 2021-03-18T15:31Z 541K followers, 87.5K engagements
"The Null Space & Column Space of a Matrix Algebraically & Geometrically"
YouTube Link @drtrefor 2018-06-16T19:27Z 541K followers, 93K engagements
"Intro to Sets Examples Notation & Properties"
YouTube Link @drtrefor 2017-04-25T02:50Z 541K followers, 310.8K engagements
"Geometric Series Convergence Derivation and Example"
YouTube Link @drtrefor 2019-02-14T12:42Z 541K followers, 156.1K engagements
"The Divergence Theorem // Geometric Intuition & Statement // Vector Calculus"
YouTube Link @drtrefor 2020-12-14T15:44Z 541K followers, 163.6K engagements
"Choosing Which Convergence Test to Apply to X Series"
YouTube Link @drtrefor 2019-02-25T12:31Z 541K followers, 603.6K engagements
"The Empty Set & Vacuous Truth"
YouTube Link @drtrefor 2018-08-24T14:27Z 541K followers, 135.4K engagements
"How to write a thesis using LaTeX full tutorial"
YouTube Link @drtrefor 2021-10-26T16:33Z 541K followers, 891.9K engagements
"Lagrange Multipliers Geometric Meaning & Full Example"
YouTube Link @drtrefor 2019-11-27T20:32Z 541K followers, 435.2K engagements
"Dirac's Belt Trick: Why a X rotation twists space but a X rotation fixes it"
YouTube Link @drtrefor 2022-05-23T15:03Z 541K followers, 70.9K engagements
"How I make beautiful GRAPHS and PLOTS using LaTeX"
YouTube Link @drtrefor 2022-05-30T16:35Z 541K followers, 565.2K engagements
"What is a Solution to a Linear System Intro"
YouTube Link @drtrefor 2018-04-28T18:03Z 541K followers, 114.8K engagements
"Analyzing an argument for validity"
YouTube Link @drtrefor 2017-05-23T17:45Z 541K followers, 133K engagements
"This paperclip "remembers" its shape"
YouTube Link @drtrefor 2025-04-14T17:28Z 541K followers, 12.1K engagements
"All the LOGARITHMS needed for calculus actually explained"
YouTube Link @drtrefor 2025-02-24T17:41Z 541K followers, 23.6K engagements
"Intro to Logical Statements"
YouTube Link @drtrefor 2017-05-15T20:56Z 541K followers, 279.5K engagements
"The Geometric Meaning of Differential Equations // Slope Fields Integral Curves & Isoclines"
YouTube Link @drtrefor 2021-02-11T16:17Z 541K followers, 111.4K engagements
"Autonomous Equations Equilibrium Solutions and Stability"
YouTube Link @drtrefor 2021-03-10T16:47Z 541K followers, 146.2K engagements
"How to make beautiful math graphics using Tikz & LaTeX"
YouTube Link @drtrefor 2022-04-19T16:00Z 541K followers, 198.2K engagements
"Intro to LaTeX : Learn to write beautiful math equations Part 1"
YouTube Link @drtrefor 2020-05-05T16:00Z 541K followers, 1.4M engagements
"How I Make Presentations Using LaTeX & Beamer"
YouTube Link @drtrefor 2022-08-03T16:00Z 541K followers, 284.8K engagements
"Proof by Contrapositive Method & First Example"
YouTube Link @drtrefor 2017-06-13T14:46Z 541K followers, 167.7K engagements
"Bayes' Theorem - The Simplest Case"
YouTube Link @drtrefor 2017-11-19T01:32Z 541K followers, 1.8M engagements