Dissertation: typos

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Dimitri Lozeve 2018-07-30 17:57:29 +01:00
parent 34073a3ef8
commit 47ef78df46
2 changed files with 18 additions and 16 deletions

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@ -90,7 +90,7 @@ non-temporal, static graph.
A \emph{graph} is a couple $G = (V, E)$, where $V$ is a finite set
of \emph{nodes} (or \emph{vertices}), and $E \subseteq V\times V$ is
a set of \emph{edges}. A \emph{weighted graph} is defined by
$G = (V, E, w)$, where $w : E\mapsto \mathbb{R}_+$ is fcalled the
$G = (V, E, w)$, where $w : E\mapsto \mathbb{R}_+$ is called the
\emph{weight function}.
\end{defn}
@ -147,6 +147,8 @@ convention a zero weight corresponds to an absent edge.
\section{Examples of applications}%
\label{sec:exampl-appl}
%% TODO
\section{Network partitioning}%
\label{sec:network-partitioning}
@ -224,9 +226,9 @@ conserve the overall organisation of the space. For this, we use a
structure called a \emph{simplicial complex}, which is a kind of
higher-dimensional generalization of graphs.
The building blocks of this representation will be \emph{simplices},
The building blocks of this representation will be \emph{simplexes},
which are simply the convex hull of an arbitrary set of
points. Examples of simplices include single points, segments,
points. Examples of simplexes include single points, segments,
triangles, and tetrahedrons (in dimensions 0, 1,, 2, and 3
respectively).
@ -234,7 +236,7 @@ respectively).
The \emph{$k$-dimensional simplex} $\sigma = [x_0,\ldots,x_k]$ is
the convex hull of the set $\{x_0,\ldots,x_k\} \in \mathbb{R}^d$,
where $x_0,\ldots,x_k$ are affinely independent. $x_0,\ldots,x_k$
are called the \emph{vertices} of $\sigma$, and the simplices
are called the \emph{vertices} of $\sigma$, and the simplexes
defined by the subsets of $\{x_0,\ldots,x_k\}$ are called the
\emph{faces} of $\sigma$.
\end{defn}
@ -282,7 +284,7 @@ respectively).
\caption{Triangle}
\end{subfigure}%
%
\caption{Examples of simplices}%
\caption{Examples of simplexes}%
\label{fig:simplex}
\end{figure}
@ -292,11 +294,11 @@ so that the resulting object can adequately reflect the topological
structure of the metric space.
\begin{defn}[Simplicial complex]
A \emph{simplicial complex} is a collection $K$ of simplices such
A \emph{simplicial complex} is a collection $K$ of simplexes such
that:
\begin{itemize}
\item any face of a simplex of $K$ is a simplex of $K$
\item the intersection of two simplices of $K$ is either the empty
\item the intersection of two simplexes of $K$ is either the empty
set or a common face or both.
\end{itemize}
\end{defn}
@ -339,7 +341,7 @@ structure of the metric space.
\end{scope}
\end{tikzpicture}
\caption{Example of a simplicial complex, with two connected
components, two 3-simplices, and one 5-simplex.}%
components, two 3-simplexes, and one 5-simplex.}%
\label{fig:simplical-complex}
\end{figure}
@ -364,7 +366,7 @@ important smaller features.
%% TODO rewrite using the Cech filtration as an example?
The ideal solution to these problems is to consider all scales at
once: this is the objective of \emph{filtered simplical complexes}.
once: this is the objective of \emph{filtered simplicial complexes}.
\begin{defn}[Filtration]
A \emph{filtered simplicial complex}, or simply a \emph{filtration},
@ -411,7 +413,7 @@ construction is called a \emph{barcode}.
In order to interpret the results of the persistent homology
computation, we need to compare the output for a particular data set
to a suitable null model. For this, we need some kind of a similarity
to a suitable null model. For this, we need some kind of similarity
measure between barcodes and a way to evaluate the statistical
significance of the results.
@ -498,11 +500,11 @@ We now consider the problem of applying persistent homology to network
data. An undirected network is already a simplicial complex of
dimension 1. However, this will not be sufficient to capture enough
topological information: we need to introduce higher-dimensional
simplices. The first possible method is to project the network on a
simplexes. The first possible method is to project the network on a
metric space~\cite{otter_roadmap_2017}, thus transforming the network
data into a point cloud data. For this, we need to compute the
distance between each pair of nodes in the network (via shortest path
distance for instance). This also requires the network to be
distance between each pair of nodes in the network (with the shortest
path distance for instance). This also requires the network to be
connected.
Another usual method for weighted networks is called the \emph{weight
@ -515,7 +517,7 @@ filters the network based on weights. The procedure works as follows:
\item At filtration step $t$, keep only the edges whose weights are
less than $w_t$, thus creating an unweighted graph.
\item Define the maximal cliques of the resulting graph to be
simplices.
simplexes.
\end{enumerate}
At each step of the filtration, we construct a simplicial complex
@ -573,7 +575,7 @@ compute persistence on alternating nested sequences:
This sequence can in turn be computed from a temporal network by
computing the union of each pair of consecutive time steps,
constructing a alternating sequence.
constructing an alternating sequence.
Zigzag persistence is a special case of the more general concept of
\emph{multi-parameter
@ -665,7 +667,7 @@ statistical computations.
\cite{reininghaus_stable_2015,kwitt_statistical_2015}
\subsection{Persistence weighted gaussian kernel}
\subsection{Persistence weighted Gaussian kernel}
\cite{kusano_kernel_2017}