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% AUTHOR: Amlal El Mahrouss
% PURPOSE: WG04.2: Sum Analysis.
\documentclass[11pt, a4paper]{article}
\usepackage{graphicx}
\usepackage{listings}
\usepackage{amsmath,amssymb,amsthm}
\usepackage{xcolor}
\usepackage{hyperref}
\usepackage{mathtools}
\usepackage[margin=0.5in,top=1in,bottom=1in]{geometry}
\title{Sum Analysis.}
\author{Amlal El Mahrouss\\\texttt{amlal@nekernel.org}}
\date{February 2026}
\begin{document}
\maketitle
\begin{center}
\rule[0.01cm]{17cm}{0.01cm}
\end{center}
\begin{abstract}
The paper covers several definitions that are made to be used for sum analysis; their purpose has been kept abstract for flexibility reasons.
\end{abstract}
\section{DEFINITIONS}
We assume $x \in \mathbb{R}, \quad a, b \in \mathbb{N}, \quad 0 < a < b < \cos(0)$ for:
\subsection{DEFINITION OF THE S-INTEGRAL:}
\begin{equation}
I_{1}(a, b, x) \coloneqq \int_{a}^{b} S(x)dx
\end{equation}
\subsection{DEFINITION OF THE S-FUNCTION:}
\begin{equation}
S(x, u) = \sum_{k=1}^{t} (\frac{dx}{du}\cdot k) \cdot x, \quad x > 0, \quad t > k
\end{equation}
\end{document}
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