In mathematics, a stuck unknot is a closed polygonal chain that is topologically equal to the unknot but cannot be deformed to a simple polygon by rigid motions of the segments.Similarly a stuck open chain is an open polygonal chain such that the segments may not be aligned by moving rigidly its segments. Topologically such a chain can be unknotted, but the limitation of using only rigid motions of the segments can create nontrivial knots in such a chain. Consideration of such "stuck" configurations arises in the study of molecular chains in biochemistry. (Wikipedia).
When You Feel Stuck in a Relationship
This is a film about being stuck in a relationship - neither happily being able to stay nor freely being able to move on. Why do we find it so hard to move forward? Where does the feeling of being stuck come from, and what might we do to overcome it? Sign up to our new newsletter and get
From playlist RELATIONSHIPS
Many of us feel ‘stuck’ - wishing we could escape a job or relationship, while being incapable of doing so. Coming unstuck involves examining unhelpful messages we internalised in childhood. Sign up to our mailing list to receive 10% off your first order with us: https://r1.dotdigital-pag
From playlist SELF
Now You Know: Bursting Balloons
When you stick a needle in a balloon, the rubber tears—the balloon pops. But high-speed video reveals the details, and there are some surprises to be had. How does the rubber unzip as it tears? It’s different for a round balloon and a longer balloon-animal balloon. And if the balloon is fi
From playlist Now You Know
Yes. I make mistakes ... rarely. http://www.flippingphysics.com
From playlist Miscellaneous
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://twitter.com/worldscienceu
From playlist Science Unplugged: Particle Physics
Legendrian Torus and Cable Links - Lisa Traynor
Joint IAS/Princeton University Symplectic Geometry Seminar Topic: Legendrian Torus and Cable Links Speaker: Lisa Traynor Affiliation: Bryn Mawr College Date: November 22, 2021 Legendrian torus knots were classified by Etnyre and Honda. I will explain the classification of Legendrian toru
From playlist Mathematics
I guess this is what happens when you don't put anything up to keep the shopping carts from falling out of the truck.
From playlist Inertia
Nicholas Cazet: Surface-link Families with Arbitrarily Large Triple Point Number
Nicholas Cazet, UC Davis Title: Surface-link Families with Arbitrarily Large Triple Point Number Analogous to a classical knot diagram, a surface-knot can be generically projected to 3-space and given crossing information to create a broken sheet diagram. A generic compact surface in 3-spa
From playlist 39th Annual Geometric Topology Workshop (Online), June 6-8, 2022
Joel Hass - Lecture 1 - Algorithms and complexity in the theory of knots and manifolds - 18/06/18
School on Low-Dimensional Geometry and Topology: Discrete and Algorithmic Aspects (http://geomschool2018.univ-mlv.fr/) Joel Hass (University of California at Davis, USA) Algorithms and complexity in the theory of knots and manifolds Abstract: These lectures will introduce algorithmic pro
From playlist Joel Hass - School on Low-Dimensional Geometry and Topology: Discrete and Algorithmic Aspects
Joel Hass - Lecture 3 - Algorithms and complexity in the theory of knots and manifolds - 20/06/18
School on Low-Dimensional Geometry and Topology: Discrete and Algorithmic Aspects (http://geomschool2018.univ-mlv.fr/) Joel Hass (University of California at Davis, USA) Algorithms and complexity in the theory of knots and manifolds Abstract: These lectures will introduce algorithmic pro
From playlist Joel Hass - School on Low-Dimensional Geometry and Topology: Discrete and Algorithmic Aspects
Joel Hass - Lecture 4 - Algorithms and complexity in the theory of knots and manifolds - 21/06/18
School on Low-Dimensional Geometry and Topology: Discrete and Algorithmic Aspects (http://geomschool2018.univ-mlv.fr/) Joel Hass (University of California at Davis, USA) Algorithms and complexity in the theory of knots and manifolds Abstract: These lectures will introduce algorithmic pro
From playlist Joel Hass - School on Low-Dimensional Geometry and Topology: Discrete and Algorithmic Aspects
Why do shoelaces untie themselves?
Failure to stay knotty is a two-stage process according to a new study of lace mechanics. Learn more: http://scim.ag/2oVypF9
From playlist Materials and technology
Paul Turner: A hitchhiker's guide to Khovanov homology - Part I
Find this video and other talks given by worldwide mathematicians on CIRM's Audiovisual Mathematics Library: http://library.cirm-math.fr. And discover all its functionalities: - Chapter markers and keywords to watch the parts of your choice in the video - Videos enriched with abstracts, b
From playlist Geometry
Do KNOT watch this video! #SoME1
This video is an entry to the 3Blue1Brown, The Summer of Math Exposition, about proving the existence of prime knots and the interesting steps towards the result. Some images produced with SeifertView, Jarke J. van Wijk, Technische Universiteit Eindhoven. Download SeifertView at the link
From playlist Summer of Math Exposition Youtube Videos
Trefoil disguises: http://shpws.me/Tk5w Unknot disguises: http://shpws.me/Tk5e The idea to make optical illusions with knots came from a project one of my students, Austin Elliott, did for the "3D printing and math" class I teach at Oklahoma State. In Austin's design the knot could cast s
From playlist Illusions
Knotty Problems - Marc Lackenby
Knots are a familiar part of everyday life, for example tying your tie or doing up your shoe laces. They play a role in numerous physical and biological phenomena, such as the untangling of DNA when it replicates. However, knot theory is also a well-developed branch of pure mathematics.
From playlist Oxford Mathematics Public Lectures