Unsolved problems in mathematics | Model theory | Conjectures
The Vaught conjecture is a conjecture in the mathematical field of model theory originally proposed by Robert Lawson Vaught in 1961. It states that the number of countable models of a first-order complete theory in a countable language is finite or ℵ0 or 2ℵ0. Morley showed that the number of countable models is finite or ℵ0 or ℵ1 or 2ℵ0, which solves the conjecture except for the case of ℵ1 models when the continuum hypothesis fails. For this remaining case, Robin Knight has announced a counterexample to the Vaught conjecture and the topological Vaught conjecture. As of 2021, the counterexample has not been verified. (Wikipedia).
What is the Riemann Hypothesis?
This video provides a basic introduction to the Riemann Hypothesis based on the the superb book 'Prime Obsession' by John Derbyshire. Along the way I look at convergent and divergent series, Euler's famous solution to the Basel problem, and the Riemann-Zeta function. Analytic continuation
From playlist Mathematics
Concavity and Parametric Equations Example
Please Subscribe here, thank you!!! https://goo.gl/JQ8Nys Concavity and Parametric Equations Example. We find the open t-intervals on which the graph of the parametric equations is concave upward and concave downward.
From playlist Calculus
The Boys Season 2 SPOILERCAST - The Adam Savage Project - 9/29/20
Join the Tested channel membership community here: https://www.youtube.com/channel/UCiDJtJKMICpb9B1qf7qjEOA/join Tested's head of production Joey Fameli joins us this week as we discuss the second season of the show The Boys! We talk about how the show's unique portrayal of superheroes go
From playlist The Adam Savage Project
A (compelling?) reason for the Riemann Hypothesis to be true #SOME2
A visual walkthrough of the Riemann Zeta function and a claim of a good reason for the truth of the Riemann Hypothesis. This is not a formal proof but I believe the line of argument could lead to a formal proof.
From playlist Summer of Math Exposition 2 videos
Introduction to Parametric Equations
This video defines a parametric equations and shows how to graph a parametric equation by hand. http://mathispower4u.yolasite.com/
From playlist Parametric Equations
What is the ham sandwich theorem?
From playlist Mathematics
An Infinite Product Conjecture - Monday Math Nugget #2
Today we're answering a question posed in the comment section of the previous MMN... The conjecture is: since any quotient of finite products of integers cannot be an integer if all factors in the numerator are odd and at least one in the denominator is even, then a quotient of infinite
From playlist Monday Math Nuggets
How Pratt & Whitney Changed Aviation
Click here https://bit.ly/3EyARXG for the Eight Sleep Black Friday Sale: $550 off the Pod Mattress, $300 off the Pod Cover Promo code DROID at checkout. Pratt & Whitney built arpound 50% of all the allied aero engines used in WW2 and nearly all of the them were based on one ground braking
From playlist Planes, Trains and Automobiles
B04 Example problem of simple harmonic oscillation
Solving an example problem of simple harmonic oscillation, which requires calculating the solution to a second order ordinary differential equation.
From playlist Physics ONE
How to Make Piezoelectric Crystal Speaker
I make a loud speaker for a clock radio using a piezoelectric crystal. Actually I experiment with a variety of piezo crystals. That includes a piezoelectric igniter crystal from a BBQ lighter and a homemade/DIY rochelle salt piezoelectric crystal. I also try out a piezo buzzer from Radio S
From playlist Currently Popular
Ever wondered what a partial sum is? The simple answer is that a partial sum is actually just the sum of part of a sequence. You can find a partial sum for both finite sequences and infinite sequences. When we talk about the sum of a finite sequence in general, we’re talking about the sum
From playlist Popular Questions
L-8: Mystery of the "Ghost Blimp"
The U.S. Navy blimp L-8 went on a routine anti-submarine patrol on August 16, 1942. Five hours later, it drifted ashore, its two-man crew mysteriously missing. The History Guy remembers the mystery of the "ghost blimp." This is original content based on research by The History Guy. Image
From playlist California, documentaries of forgotten history
Calculus 2: Parametric Equations (1 of 20) What is a Parametric Equation?
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain what is a parametric equation. A parametric equation is an equation that expresses each variable of an equation in terms of another variable. Next video in the series can be seen at: https://
From playlist CALCULUS 2 CH 17 PARAMETRIC EQUATIONS
PHYS 125 | Lecture 10D 1 | Elasic Collisions Result
This lecture is from PHYS 125 at Rice University in the Fall of 2018. It is a 360 video, so be sure to drag the screen to look around!
From playlist PHYS 125 | Energy
Michael Tanoff - Son of O'Gara - G4G12 April 2016
Mathematical philately over the past half century
From playlist G4G12 Videos
Excel Magic Trick 532: Count Blanks In Dynamic Range INDEX MATCH COUNTBLANK functions
Download Files: https://people.highline.edu/mgirvin/YouTubeExcelIsFun/EMT531-533.xls See how to count blanks in a dynamic range using COUNTIF, INDEX, MATCH, COUNTA and OFFSET. Learn about the difference between an empty cell and a blank. See how to create dynamic ranges with INDEX and OFF
From playlist Excel Series: Magic Tricks (3rd 200 videos)
The Coronavirus Explained & What You Should Do
Get Merch designed with ❤ from https://kgs.link/shop-120 Join the Patreon Bird Army 🐧 https://kgs.link/patreon ▼▼ More infos and links are just a click away ▼▼ A huge thanks to the experts who helped us on short notice with the video. Especially “Our World in Data”, the online publica
From playlist Medicine & Biology
We Have A Dangerous Superhero Obsession
Keep exploring at https://brilliant.org/APERTURE. Get started for free, and hurry—the first 200 people get 20% off an annual premium subscription. Read the story: https://aperture.gg/blogs/the-universe/what-if-black-panther-was-real Merch: https://aperture.gg/merch Who is your favorite s
From playlist Philosophy & Psychology 🧠
Proof: Supremum and Infimum are Unique | Real Analysis
If a subset of the real numbers has a supremum or infimum, then they are unique! Uniqueness is a tremendously important property, so although it is almost complete trivial as far as difficulty goes in this case, we would be ill-advised to not prove these properties! In this lesson we'll be
From playlist Real Analysis
Friendly Fire: Three Planes That Shot Themselves Down
Fighter aircraft are among the most complex machines in the world, and those who fly them face many risks, including their own weapons. The History Guy recalls three jet fighter aircraft whose own weapons caused their demise. This is original content based on research by The History Guy.
From playlist US History