WUT_Computer_Science/NotProgramming/ENUME/projectA/sections/16-discussion-of-the-result.tex
Krzysztof kuhy Rudnicki ffa5dad02a Split 19 over-cap LaTeX reports, proving each PDF is unchanged
The 250-line cap applies to prose too, and the reports were the worst
offenders -- ENUME's projectA.tex alone was 1,876 lines. Each is now a
preamble plus one \input{} per section, which is how a long LaTeX document is
normally organised; not one byte of prose was rewritten.

"The PDF is unchanged" is checked by a script rather than by eye, because
hashing the PDF cannot work: pdflatex stamps a /CreationDate and an /ID into
every build, so two runs of the SAME source already differ. tex_fingerprint.sh
compares what a reader sees instead -- page count plus a hash of the extracted
text -- and it is stable across rebuilds of untouched sources, which is the
property that makes it usable as a gate.

It earned its keep immediately. Both ECOTE reports quote an example LaTeX
document inside an lstlisting block, so \end{document} appears in the middle
of the file; splitting on the FIRST one stranded everything after it. Same
page count, different text, caught automatically. EOPSY lab3 exposed a second
bug: a \section{} title that runs onto the next line.

Result: 19 .tex over the cap -> 1. The survivor,
ELAC/.../03-building-nfa-...tex, is 418 lines of consecutive tikz figures
with no subsection to split on and needs a hand-placed boundary.

Verified: 29 splits across two passes (section, then subsection for the
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scripts/tex_fingerprint.sh --check.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0172dj34FDpao6wsix8ZuCzE
2026-08-28 19:47:12 +02:00

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\section{Discussion of the result}
Following plot was generated using \hyperlink{function4}{task4Plot} function, using maxMatrixSize = 25 and generating random symmetrical matrix of size i x i in each loop. Both QR methods were given exactly the same matrices.
\subsection{Plot}
\begin{center}
\includegraphics[scale=0.5]{task4plot.eps}
\end{center}
\newpage
\subsection{Shift method superiority}
As we can see:
QR method with shifts is much more efficient and reliable.
\begin{enumerate}
\item For big enough matrices it requires ten times less iterations compared to QR method without shifts.
\item It is more efficient in our chosen matrix.
\item It can work with non-symetric matrices
\item Has no problem with generating complex eigen values.
\end{enumerate}
One thing that does not change much is the precision, with both algorithms outputting similar results.
\addtocontents{toc}{\protect\newpage}
\chapter{Code appendix}