Knots and links | Slice knots and links
In the mathematical area of knot theory, a ribbon knot is a knot that bounds a self-intersecting disk with only ribbon singularities. Intuitively, this kind of singularity can be formed by cutting a slit in the disk and passing another part of the disk through the slit. More precisely, this type of singularity is a closed arc consisting of intersection points of the disk with itself, such that the preimage of this arc consists of two arcs in the disc, one completely in the interior of the disk and the other having its two endpoints on the disk boundary. (Wikipedia).
This knot is very useful for adjusting tie downs quickly and easily. For example, a tarp could be held down by a series of these knots and be made very tight so the wind cannot make it rise, and easily be removed simply by sliding the knots later. A taut line knot is also used to keep larg
From playlist Practical Projects & Skills
This step by step guide demonstrates tying 15 types: 00:36 Overhand 01:22 Square 02:36 Figure Eight 03:40 Bowline, 05:29 Running 06:19 Half, 07:45 Timber, 09:42 Rolling, 10:43 Clove Hitches 11:30 Cat's Paw 12:58 Single, 14:40 Double Sheet or Becket Bends 15:30 Fisherman's, 17:09 Doubl
From playlist How To Tutorials
Link: https://www.geogebra.org/m/a72HSgzU
From playlist Geometry: Challenge Problems
How to Tie the Most Useful Knot in the World (Bowline)
This is a short video to help those who have seen many of my past videos where I use a bowline knot. This is the most useful knot you will ever learn. It will not slip when in use, and comes undone easily even after being tightened under thousands of pounds. #NightHawkInLight -~-~~-~~~-~~
From playlist Practical Projects & Skills
Untangling the beautiful math of KNOTS
Visit ► https://brilliant.org/TreforBazett/ to help you learn STEM topics for free, and the first 200 people will get 20% off an annual premium subscription. Check out my MATH MERCH line in collaboration with Beautiful Equations ►https://www.beautifulequation.com/pages/trefor Suppose yo
From playlist Cool Math Series
Link: https://www.geogebra.org/m/bd69d6u4
From playlist Geometry: Challenge Problems
Knots, Virtual Knots and Virtual Knot Cobordism by Louis H. Kauffman
PROGRAM KNOTS THROUGH WEB (ONLINE) ORGANIZERS: Rama Mishra, Madeti Prabhakar, and Mahender Singh DATE & TIME: 24 August 2020 to 28 August 2020 VENUE: Online Due to the ongoing COVID-19 pandemic, the original program has been canceled. However, the meeting will be conducted through onl
From playlist Knots Through Web (Online)
What's a knot? Geometry Terms and Definitions
A mathematical definition of a knot. Geometer: Louise McCartney Artwork: Kelly Vivanco Director: Michael Harrison Written & Produced by Kimberly Hatch Harrison and Michael Harrison ♦♦♦♦♦♦♦♦♦♦ Ways to support our channel: ► Join our Patreon : https://www.patreon.com/socratica ► Mak
From playlist Socratica: The Geometry Glossary Series
Link: https://www.geogebra.org/m/JEk3MHvc
From playlist Geometry: Challenge Problems
Clément Maria (10/23/19): Parameterized complexity of quantum invariants of knots
Title: Parameterized complexity of quantum invariants of knots Abstract: We give a general fixed parameter tractable algorithm to compute quantum invariants of knots presented by diagrams, whose complexity is singly exponential in the carving-width (or the tree-width) of the knot diagram.
From playlist AATRN 2019
Kyle Hayden - A user's guide to building ribbon surfaces and holomorphic curves in 4-manifolds
June 21, 2018 - This talk was part of the 2018 RTG mini-conference Low-dimensional topology and its interactions with symplectic geometry We'll review a variety of hands-on ways to build ribbon surfaces in 4-manifolds, with an eye towards building holomorphic curves and symplectic/Lagrang
From playlist 2018 RTG mini-conference on low-dimensional topology and its interactions with symplectic geometry I
Twisted topological tangles or: the knot theory of knitting - Elisabetta Matsumoto
Workshop on Topology: Identifying Order in Complex Systems Topic: Twisted topological tangles or: the knot theory of knitting Speaker: Elisabetta Matsumoto Affiliation: Georgia Institute of Technology Date: April 30, 2021 For more video please visit http://video.ias.edu
From playlist Mathematics
The Shape of DNA - Numberphile
The amazing knots, twists and turns inside our cells. This is Part One of DNA Topology featuring Professor Mariel Vazquez from UC Davis. More links & stuff in full description below ↓↓↓ Part Two: https://youtu.be/UkmQNbvlK8s Videos by Brady Haran Editing and animation in this video by Pe
From playlist Women in Mathematics - Numberphile
Making a Skirt from a Tablecloth: Sewing Basics #2
http://thegeekgroup.org/ - In our first project video of the series, Sophia demonstrates how to take a simple circle tablecloth, and turn it into a fun, versatile skirt. This is a great project for any beginning sewer who's looking for something simple to try out! In this video you'll lear
From playlist Basic Sewing
Barbara Nimershiem: Geometric Triangulations of a Family of Hyperbolic 3-Braids
Barbara Nimershiem, Franklin & Marshall College Title: Geometric Triangulations of a Family of Hyperbolic 3-Braids We construct topological triangulations for complements of $(-2, 3, n)$-pretzel knots and links with $n \geq 7$. Following a procedure outlined by Futer and Gueritaud, we use
From playlist 39th Annual Geometric Topology Workshop (Online), June 6-8, 2022
Hyperbolic Knot Theory (Lecture - 1) by Abhijit Champanerkar
PROGRAM KNOTS THROUGH WEB (ONLINE) ORGANIZERS: Rama Mishra, Madeti Prabhakar, and Mahender Singh DATE & TIME: 24 August 2020 to 28 August 2020 VENUE: Online Due to the ongoing COVID-19 pandemic, the original program has been canceled. However, the meeting will be conducted through onl
From playlist Knots Through Web (Online)
An introduction to modified traces, Jonathan Kujawa, Lecture II
Lecture series on modified traces in algebra and topology The trace of a map and the dimension of a representation are fundamental invariants in representation theory. They are useful both for proving results in representation theory and for applications in other areas (e.g., low-dimensio
From playlist Lecture series on modified traces in algebra and topology
Rope Trick for my neighborhood
During my show, a rope is spotted in my sleeve. I pull it...
From playlist My Magic
Over-Underwear: British Nylon Fair Fashion Show (1960) | British Pathé
Watch these glamorous ladies from the 1960's model what are seemingly cocktail dresses but are actually underwear at the British Nylon Fair at the Royal Albert Hall in London. For Archive Licensing Enquiries Visit: https://goo.gl/W4hZBv Explore Our Online Channel For FULL Documentaries, F
From playlist Fashion of Yesteryear | British Pathé
Unofoil with cogs: http://shpws.me/wk7u Trefoil with cogs: http://shpws.me/wk7H Cinquefoil with cogs: http://shpws.me/wk7t
From playlist 3D printing