ChengsongTanPhdThesis/Chapters/Finite.tex
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  1044 	\ref{grewritesSimpalts}, \ref{gstarRdistinctGeneral}, \ref{rderRsimpAltsCommute}, and
  1044 	\ref{grewritesSimpalts}, \ref{gstarRdistinctGeneral}, \ref{rderRsimpAltsCommute}, and
  1045 	\ref{insideSimpRemoval}.
  1045 	\ref{insideSimpRemoval}.
  1046 \end{proof}
  1046 \end{proof}
  1047 \noindent
  1047 \noindent
  1048 This closed form has a variant which can be more convenient in later proofs:
  1048 This closed form has a variant which can be more convenient in later proofs:
  1049 \begin{corollary}
  1049 \begin{corollary}{altsClosedForm1}
  1050 	If $s \neq []$ then 
  1050 	If $s \neq []$ then 
  1051 	$\rderssimp \; (\sum \; rs) \; s = 
  1051 	$\rderssimp \; (\sum \; rs) \; s = 
  1052 	\rsimp{(\sum \; (\map \; \rderssimp{\_}{s} \; rs))}$.
  1052 	\rsimp{(\sum \; (\map \; \rderssimp{\_}{s} \; rs))}$.
  1053 \end{corollary}
  1053 \end{corollary}
  1054 \noindent
  1054 \noindent
  1496 \end{center}
  1496 \end{center}
  1497 
  1497 
  1498 \end{proof}
  1498 \end{proof}
  1499 
  1499 
  1500 \noindent
  1500 \noindent
  1501 where in (1) the $\textit{Suffix}( r_1, s)$ are the all the suffixes of $s$ where $\rderssimp{ r_1}{s'}$ is nullable ($s'$ being a suffix of $s$).
  1501 (1) is by the corollary \ref{seqEstimate1}
  1502 The reason why we could write the derivatives of a sequence this way is described in section 2.
       
  1503 The term (2) is used to control (1). 
  1502 The term (2) is used to control (1). 
  1504 That is because one can obtain an overall
  1503 That is because one can obtain an overall
  1505 smaller regex list
  1504 smaller regex list
  1506 by flattening it and removing $\ZERO$s first before applying $\distinctWith$ on it.
  1505 by flattening it and removing $\ZERO$s first before applying $\distinctWith$ on it.
  1507 Section 3 is dedicated to its proof.
  1506 Section 3 is dedicated to its proof.