What is the Universe expanding into?
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From playlist Science Unplugged: Cosmology
What Is The Universe Expanding Into?
I get this question... a lot. "Since astronomers know that the Universe is expanding, what's it expanding into? What's outside of the Universe?" The short answer is that this is a nonsense question, the Universe isn't expanding into anything, it's just expanding. The definition of the
From playlist Big Bang
Is Everything Actually Shrinking?
Whoa, here's something to think about. Maybe the Universe isn't expanding at all. Maybe everything is actually just shrinking, so it looks like it's expanding. Turns out, scientists have through of this. Support us at: http://www.patreon.com/universetoday More stories at: http://www.unive
From playlist Cosmology
Do We Expand With The Universe?
Help support MinuteEarth - http://subbable.com/minuteearth MinutePhysics is on Google+ - http://bit.ly/qzEwc6 And facebook - http://facebook.com/minutephysics And twitter - @minutephysics Get a free audiobook at http://bit.ly/ZEAtPh Minute Physics provides an energetic and entertaining
From playlist MinutePhysics
Have you ever looked up in the night sky and wondered, “Why is space black?” Follow Julian on Twitter: https://twitter.com/jhug00 Read More: Why is space black? http://phys.org/news/2014-12-space-black.html “If you've done your homework, you know that space is huge. It even be in
From playlist DNews Favorites
What exactly is space? Brian Greene explains what the "stuff" around us is. Subscribe to our YouTube Channel for all the latest from World Science U. Visit our Website: http://www.worldscienceu.com/ Like us on Facebook: https://www.facebook.com/worldscienceu Follow us on Twitter: https:
From playlist Science Unplugged: Physics
What is length contraction? Length contraction gives the second piece (along with time dilation) of the puzzle that allows us to reconcile the fact that the speed of light is constant in all reference frames.
From playlist Relativity
Hilbert's curve slowly eating the square
From playlist Space filling curves
Is there any place in the Universe where there's truly nothing? Consider the gaps between stars and galaxies? Or the gaps between atoms? What are the properties of nothing?
From playlist Guide to Space
Once you've learned Flexbox, you'll wonder how you ever managed to build websites without it. This course gets you up to speed as quickly as possible. You can take the interactive version of the course here: https://scrimba.com/g/gflexbox Flexbox gives you all the tools you needed in orde
From playlist Full Courses in One Video
What is an i-dimensional hole in a space?
What is an i-dimensional hole in a space? I describe how topology provides (at least) two answers to this question --- both the homotopy groups and the homology groups of that space. I give some intuition for what an i-dimensional hole is, and I give some intuition for how homotopy groups
From playlist Topology - Henry Adams - 2022
Homeomorphisms and Homotopy Equivalences [Henry Adams]
We give a brief introduction to homeomorphisms, homotopy equivalences, and the difference between them. These notions describe when two shapes are described to be "the same" to a topologist. his tutorial was contributed as part of the WinCompTop+AATRN Tutorial-a-thon in Spring 2021: https
From playlist Tutorial-a-thon 2021 Spring
Shrinking Gradient Kahler-Ricci Solitons and Toric Geometry
Speaker: Charles Cifarelli (UC Berkeley) - Abstract: In this talk, I will present some recent work on the uniqueness of shrinking gradient K\"ahler-Ricci solitons on non-compact toric manifolds. In particular, the familiar Delzant classification holds in this context, and this allows one t
From playlist Informal Geometric Analysis Seminar
Shrinking Space: My Perspective on Perspective
A math video about perspective in Western art. Erratum -- the slide at 5:10 that says "y = a + b" -- that should really be "y' = a + b". Apologies to everybody!
From playlist Summer of Math Exposition Youtube Videos
This is an old video. See StatsMrR.com for access to hundreds of 1-3 minute, well-produced videos for learning Statistics. In this older video: work with various conditional probability situations
From playlist Older Statistics Videos and Other Math Videos
The Poincaré Conjecture (special lecture) John W. Morgan [ICM 2006]
slides for this talk: https://www.mathunion.org/fileadmin/IMU/Videos/ICM2006/tars/morgan2006.pdf The Poincaré Conjecture (special lecture) John W. Morgan Columbia University, USA https://www.mathunion.org/icm/icm-videos/icm-2006-videos-madrid-spain/icm-madrid-videos-24082006
From playlist Mathematics
F. Schulze - Mean curvature flow with generic initial data (version temporaire)
Mean curvature flow is the gradient flow of the area functional and constitutes a natural geometric heat equation on the space of hypersurfaces in an ambient Riemannian manifold. It is believed, similar to Ricci Flow in the intrinsic setting, to have the potential to serve as a tool to app
From playlist Ecole d'été 2021 - Curvature Constraints and Spaces of Metrics
Is Everything In The Universe Expanding?
The Universe is expanding. Distant galaxies are moving away from us in all directions. It's natural to wonder, is everything expanding? Is the Milky Way expanding? What about the Solar System, or even objects here on Earth. Are atoms expanding? Nope. The only thing expanding is space
From playlist Cosmology
F. Schulze - Mean curvature flow with generic initial data
Mean curvature flow is the gradient flow of the area functional and constitutes a natural geometric heat equation on the space of hypersurfaces in an ambient Riemannian manifold. It is believed, similar to Ricci Flow in the intrinsic setting, to have the potential to serve as a tool to app
From playlist Ecole d'été 2021 - Curvature Constraints and Spaces of Metrics