Results 261 to 270 of about 1,110,706 (305)
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2022
In Chapter 5, the authors take a broader view, locating in the song “Tree Tree Tree” Rogers’ long-standing interest in connections between people, places, animals, plants, and things. The song is used to show that children and parents are still connected, even when parents have to leave to go to work. The music is played by Yo-Yo Ma on the cello and by
Sara Lindey, Jason King
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In Chapter 5, the authors take a broader view, locating in the song “Tree Tree Tree” Rogers’ long-standing interest in connections between people, places, animals, plants, and things. The song is used to show that children and parents are still connected, even when parents have to leave to go to work. The music is played by Yo-Yo Ma on the cello and by
Sara Lindey, Jason King
openaire +1 more source
2023
This book is a warning and a toolkit for the future of forest recovery. The book investigates the critical biological threats endangering tree species native to the forests of eastern North America, providing a needed focus on this plight. The book suggests that if we are to save our forests, the first step is to recognize the threats in front of us ...
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This book is a warning and a toolkit for the future of forest recovery. The book investigates the critical biological threats endangering tree species native to the forests of eastern North America, providing a needed focus on this plight. The book suggests that if we are to save our forests, the first step is to recognize the threats in front of us ...
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Journal of Economic Theory, 2002 In this paper we critically examine the main workhorse model in asset pricing theory, the Lucas (1978) tree model (LT-Model), extended to include heterogeneous agents and multiple goods, and contrast it to the benchmark model in financial equilibrium theory, the real assets model (RA-Model).
David Cass, Anna Pavlova
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The Tree-to-Tree Correction Problem
Journal of the ACM, 1979The tree-to-tree correctmn problem Is to determine, for two labeled ordered trees T and T', the distance from T to T' as measured by the mlmmum cost sequence of edit operaUons needed to transform T into T' The edit operations investigated allow changing one node of a tree into another node, deleting one node from a tree, or inserting a node into a tree
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Mathematical Programming, 1994
The class of 2-tree graphs is defined inductively as follows: start with a single edge and add nodes by joining them to the two endpoints of an existing edge. Many NP-complete problems on graphs are polynomial when restricted to this class of graphs. In particular, the Steiner Tree problem is linear time solvable on graphs in this class.
Margot, François +2 more
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The class of 2-tree graphs is defined inductively as follows: start with a single edge and add nodes by joining them to the two endpoints of an existing edge. Many NP-complete problems on graphs are polynomial when restricted to this class of graphs. In particular, the Steiner Tree problem is linear time solvable on graphs in this class.
Margot, François +2 more
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2017
This chapter considers the problem of counting trees. Every connected graph G has a spanning tree, that is, a connected acyclic subgraph containing all the vertices of G. If G has no cycles, it is its own unique spanning tree. If G has cycles, we can locate any cycle and delete one of its edges. Repeat this process until no cycle remains.
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This chapter considers the problem of counting trees. Every connected graph G has a spanning tree, that is, a connected acyclic subgraph containing all the vertices of G. If G has no cycles, it is its own unique spanning tree. If G has cycles, we can locate any cycle and delete one of its edges. Repeat this process until no cycle remains.
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Theory in Biosciences, 2010
Darwin saw similarities between the evolution of species and the evolution of languages, and it is now widely accepted that similarities between related languages can often be interpreted in terms of a bifurcating descent history (‘phylogenesis’). Such interpretations are supported when the distributions of shared and unshared traits (for example, in ...
Steele, J. +1 more
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Darwin saw similarities between the evolution of species and the evolution of languages, and it is now widely accepted that similarities between related languages can often be interpreted in terms of a bifurcating descent history (‘phylogenesis’). Such interpretations are supported when the distributions of shared and unshared traits (for example, in ...
Steele, J. +1 more
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Genome trees and the tree of life
Trends in Genetics, 2002Genome comparisons indicate that horizontal gene transfer and differential gene loss are major evolutionary phenomena that, at least in prokaryotes, involve a large fraction, if not the majority, of genes. The extent of these events casts doubt on the feasibility of constructing a 'Tree of Life', because the trees for different genes often tell ...
Yuri I, Wolf +3 more
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