vault backup: 2022-12-05 12:53:16
This commit is contained in:
35
.obsidian/workspace.json
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35
.obsidian/workspace.json
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@@ -49,14 +49,26 @@
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"state": {
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"type": "markdown",
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"state": {
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"file": "AMiAL/Ćwiczenia/1 SEM/20221202121227.md",
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"file": "PI/Ćwiczenia/Ćwiczenia.md",
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@@ -122,7 +134,7 @@
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"state": {
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"type": "backlink",
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"file": "AMiAL/Ćwiczenia/1 SEM/20221202121227.md",
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@@ -139,7 +151,7 @@
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"state": {
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"file": "AMiAL/Ćwiczenia/1 SEM/20221202121227.md",
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@@ -199,24 +211,23 @@
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62
PI/Ćwiczenia/Gramatyki.md
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62
PI/Ćwiczenia/Gramatyki.md
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@@ -0,0 +1,62 @@
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```
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date: 20221205115525
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```
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# Notacja Chomsky'ego:
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$G=<V,\Sigma,P,\sigma>$, gdzie:
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- V - symbole terminalne
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- $\Sigma$ - metaalfabet - alfabet pomocniczy - symbole pomocnicze
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- P - lista produkcji
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- $\sigma$ - Głowa gramatyki
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abc
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aaaabcccccc
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aabbbc
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## $\begin{gathered}a^{n}b^{m}c^{k} &n,m,k\geqslant1\end{gathered}$
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$G_{1}=<V_1,\Sigma_1,P_1,\sigma_1>$
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$V_1 = \{a,b,c\}$
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$\Sigma_1=\{\alpha,\beta,\gamma\}$
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$P_1=\begin{cases}\alpha \rightarrow a\alpha \\ \alpha \rightarrow a\beta \\ \beta \rightarrow b\beta \\ \beta \rightarrow b\gamma \\ \gamma \rightarrow c\gamma \\ \gamma \rightarrow c \end{cases}$
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$\sigma_1 = \alpha$
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## $\begin{gathered}a^{n}b^{m}c^{n} &n,m\geqslant1\end{gathered}$
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$G_{2}=<V_2,\Sigma_2,P_2,\sigma_2>$
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$V_2 = \{a,b,c\}$
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$\Sigma_2=\{\alpha,\beta\}$
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$P_2=\begin{cases}\alpha \rightarrow a\alpha c \\ \alpha \rightarrow a\beta c \\ \beta \rightarrow b \beta \\ \beta \rightarrow b \end{cases}$
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$\sigma_2 = \alpha$
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## $\begin{gathered}a^{n}b^{n}c^{n} &n\geqslant 1 \end{gathered}$
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$G_{3}=<V_2,\Sigma_2,P_2,\sigma_2>$
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$V_3 = \{a,b,c\}$
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$\Sigma_3=\{\alpha,\beta\}$
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$P_3=\begin{cases}\alpha \rightarrow abc \\ \alpha \rightarrow a\alpha \beta c \\ b\beta \rightarrow bb \\ c\beta \rightarrow \beta c \end{cases}$
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$\gamma = \alpha$
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## Przykłady
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abbccc w $G_1$
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$\alpha \rightarrow^2 a\beta \rightarrow^3 ab\beta \rightarrow^4 abb\gamma \rightarrow^5 abbc\gamma \rightarrow^5 abbcc\gamma \rightarrow^6 abbccc$
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Drzewo gramatyki
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```
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abbccc
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||||||
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|||||γ
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||||γ
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|||γ
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||β
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|β
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α
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```
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aaabbbccc $a^nb^nc^n$
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$\alpha \rightarrow^2 a\alpha\beta c \rightarrow^2aa\alpha\beta c\beta c\rightarrow^1 aaabc\beta c\beta cc \rightarrow^{4,4} aaab\beta c\beta cc \rightarrow^4 aaab\beta\beta cc \rightarrow^3 aaabb\beta ccc\rightarrow^3 aaabbbccc$
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# Notacja BNF:
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$V={a,b,c}$
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$\Sigma = \{<\alpha>,<\beta>\}$
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$P = \{<\alpha>::= a<\alpha>c|a<\beta>c\ \\ <\beta>::= }$
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