Heaps (data structures) | Trees (data structures) | Priority queues
In computer science, a leftist tree or leftist heap is a priority queue implemented with a variant of a binary heap. Every node x has an s-value which is the distance to the nearest leaf in subtree rooted at x. In contrast to a binary heap, a leftist tree attempts to be very unbalanced. In addition to the heap property, leftist trees are maintained so the right descendant of each node has the lower s-value. The height-biased leftist tree was invented by . The name comes from the fact that the left subtree is usually taller than the right subtree. A leftist tree is a mergeable heap. When inserting a new node into a tree, a new one-node tree is created and merged into the existing tree. To delete an item, it is replaced by the merge of its left and right sub-trees. Both these operations take O(log n) time. For insertions, this is slower than Fibonacci heaps, which support insertion in O(1) (constant) amortized time, and O(log n) worst-case. Leftist trees are advantageous because of their ability to merge quickly, compared to binary heaps which take Θ(n). In almost all cases, the merging of skew heaps has better performance. However merging leftist heaps has worst-case O(log n) complexity while merging skew heaps has only amortized O(log n) complexity. (Wikipedia).
We don't know what a tree is (and this video won't tell you)
Offset your carbon footprint with Wren! They'll protect 5 extra acres of rainforest for each of the first 100 people who sign up at https://www.wren.co/join/minuteearth. It turns out that defining what is and isn't a “tree” is way harder than it seems. LEARN MORE ************** To learn m
From playlist This Is Not A Playlist
The Beech is the latest addition to our collection of videos about trees, presented by ecologist Dr Markus Eichhorn. See them all at http://www.test-tube.org.uk/trees/
From playlist Guide to Trees & Plants
Why is the elm tree associated with death. This is the first on a short series about trees. More at http://www.test-tube.org.uk/trees
From playlist Guide to Trees & Plants
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From playlist Biology
By arranging enough dominos into just the right structure, we can build a computer. But how do we arrange dominos in such a way that they can perform computation? Here, we explore the process of building domino logical circuits by carefully arranging dominos into configurations that can co
From playlist Spanning Tree Favorites
We look at the oak tree, and why our ecologist says it should lead to a new national holiday in the England. More at http://www.test-tube.org.uk/trees/
From playlist Guide to Trees & Plants
Homological Projective Geometry - Qingyuan Jiang
Short talks by postdoctoral members Topic: Homological Projective Geometry Speaker: Qingyuan Jiang Affiliation: The Chinese University of Hong Kong; Member, School of Mathematics Date: September 26, 2018 For more video please visit http://video.ias.edu
From playlist Mathematics
Laura Starkston: Unexpected symplectic fillings of links of rational surface singularities
HYBRID EVENT Recorded during the meeting "Milnor Fibrations, Degenerations and Deformations from Modern Perspectives" the September 09, 2021 by the Centre International de Rencontres Mathématiques (Marseille, France) Filmmaker: Guillaume Hennenfent Find this video and other talks given
From playlist Virtual Conference
8ECM Invited Lecture: Burak Özbağcı
From playlist 8ECM Invited Lectures
The World's Tallest Tree! | Science for Kids
Can you guess how tall the tallest tree is? Neither could we! Tag along with Jessi and Squeaks to learn all about the world’s tallest tree! ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awes
From playlist SciShow Kids
Why do Elder trees have an association with The Devil? More of our videos about trees at http://www.test-tube.org.uk/trees
From playlist Guide to Trees & Plants
Unexpected fillings, singularities, and plane curve arrangements - Laura Starkston
Joint IAS/Princeton/Montreal/Paris/Tel-Aviv Symplectic Geometry Topic: Unexpected fillings, singularities, and plane curve arrangements Speaker: Laura Starkston Affiliation: University of California, Davis Date: May 07, 2021 For more video please visit http://video.ias.edu
From playlist Mathematics
Artan Sheshmani : On the proof of S-duality modularity conjecture on quintic threefolds
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 Algebraic and Complex Geometry
Jianfeng Lin - On monopole Lefschetz number
June 29, 2018 - This talk was part of the 2018 RTG mini-conference Low-dimensional topology and its interactions with symplectic geometry
From playlist 2018 RTG mini-conference on low-dimensional topology and its interactions with symplectic geometry II
Creation of the Paris Commune & Its Communist Myth
Project France playlist- https://www.youtube.com/playlist?list=PLsGkrS0GwoS6ivoJge_lU8dXys0AqIKlK _________________________________________________________________ Maximilian of Mexico (Austrian Emperor)- https://www.youtube.com/watch?v=sZntrKGemBM My second channel M. Laser Random- htt
From playlist Project France
Find out why yew trees are often found in church yards. More tree stories at http://www.test-tube.org.uk/trees/index.htm
From playlist Guide to Trees & Plants
Slavoj Žižek: Democracy and Capitalism Are Destined to Split Up | Big Think
Slavoj Žižek: Democracy and Capitalism Are Destined to Split Up Watch the newest video from Big Think: https://bigth.ink/NewVideo Join Big Think Edge for exclusive videos: https://bigth.ink/Edge ---------------------------------------------------------------------------------- Philosopher
From playlist Capitalism in the 21st century | Big Think
Christmas Tree Harvesting Is Gravity-Defying (and Sometimes Illegal) | National Geographic
People are risking their lives in a multimillion-dollar industry you’ve never heard of. In the Caucasus Mountains of the former Soviet republic of Georgia harvesters climb to the top of these giant Nordmann fir trees and remove some of the cones. ➡ Subscribe: http://bit.ly/NatGeoSubscribe
From playlist News | National Geographic
Lecture 3 | African-American Freedom Struggle (Stanford)
Lecture 3 of Clay Carson's Introduction to African-American History Course (HIST 166) concentrating on the Modern Freedom Struggle (Fall 2007). This lecture is entitled "Shirley Graham: Transformation of an Artist/Intellectual". Recorded October 2, 2007 at Stanford University. This co
From playlist Course | African-American History: Modern Freedom Struggle