Structure Preserving Embedding
Description
Structure Preserving Embedding (SPE) is
an algorithm for embedding graphs in Euclidean
space such that the embedding is lowdimensional
and preserves the global topological
properties of the input graph. Topology
is preserved if a connectivity algorithm, such
as k-nearest neighbors, can easily recover the
edges of the input graph from only the coordinates
of the nodes after embedding. SPE
is formulated as a semidefinite program that
learns a low-rank kernel matrix constrained
by a set of linear inequalities which captures
the connectivity structure of the input graph.
Traditional graph embedding algorithms do
not preserve structure according to our definition,
and thus the resulting visualizations
can be misleading or less informative. SPE
provides significant improvements in terms
of visualization and lossless compression of
graphs, outperforming popular methods such
as spectral embedding and Laplacian eigenmaps.
We find that many classical graphs
and networks can be properly embedded using
only a few dimensions. Furthermore,
introducing structure preserving constraints
into dimensionality reduction algorithms produces
more accurate representations of highdimensional
data.
| Slides | |
| 0:00 | Structure Preserving Embedding |
| 0:14 | Introduction |
| 0:48 | Graph Embedding (1) |
| 1:25 | Graph Embedding (2) |
| 2:27 | Structure Preserving Embedding |
| 3:27 | Möbius Ladder Graph |
| 4:39 | Outline (1) |
| 4:55 | Low-Rank Objective |
| 5:53 | Preserving Structure |
| 6:59 | Preserving Graph Topology (1) |
| 8:10 | Preserving Graph Topology (2) |
| 8:11 | Structure Preserving Embedding (1) |
| 9:33 | Preserving Graph Topology (3) |
| 10:07 | Structure Preserving Embedding (2) |
| 10:43 | Implementation |
| 10:59 | Outline (2) |
| 11:17 | Experiments (1) |
| 11:26 | Experiments (2) |
| 11:51 | Experiments (3) |
| 12:35 | Experiments (4) |
| 13:15 | Dimensionality Reduction (1) |
| 14:12 | Dimensionality Reduction (2) |
| 14:55 | Experiments |
| 15:59 | Conclusion |
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