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<Text-field style="Heading 1" layout="Normal">notation infixa,</Text-field>
<Text-field style="Text" layout="Normal"><Font italic="true">s.</Font> <Font bold="true">1.</Font><Font encoding="UTF-8"> a nota\303\247\303\243o usual para operadores bin\303\241rios em que eles s\303\243o escritos entre seus argumentos; por exemplo,  P v Q  representa disjun\303\247\303\243o e   </Font><Font italic="true">x</Font> + <Font italic="true">y</Font><Font encoding="UTF-8">  adi\303\247\303\243o. Isto requer colocar entre par\303\252nteses para evitar ambiguidades em express\303\265es complexas como `2 + 3 </Font><Font family="SansSerif">x</Font> 5'; em geral, se for usado um diagrama de <Hyperlink linktarget="Dictionary:Definition/binarytree" hyperlink="true"><Font style="Dictionary Hyperlink" family="Times New Roman" encoding="UTF-8">\303\241rvore bin\303\241ria</Font></Hyperlink><Font encoding="UTF-8"> com os operadores nos n\303\263s, como na figura abaixo, para representar a estrutura de uma express\303\243o, a representa\303\247\303\243o infixa \303\251 obtida lendo os n\303\263s da esquerda para a direita; mais apropriadamente, come\303\247a-se de cima e l\303\252 em ordem a cada n\303\263 seu lado esquerdo, o pr\303\263prio n\303\263, e seu lado direito, fechando tudo entre par\303\252nteses e interagindo onde for necess\303\241rio. Compare </Font><Hyperlink linktarget="Dictionary:Definition/Polishnotation" hyperlink="true"><Font style="Dictionary Hyperlink" family="Times New Roman" encoding="UTF-8">nota\303\247\303\243o polonesa</Font></Hyperlink>, <Hyperlink linktarget="Dictionary:Definition/reversePolishnotation" hyperlink="true"><Font style="Dictionary Hyperlink" family="Times New Roman" encoding="UTF-8">nota\303\247\303\243o polonesa reversa</Font></Hyperlink>. 
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<Text-field style="Text" layout="Normal" alignment="centred"><Font bold="true">Tree diagram for  (P v Q) &amp; (R <Font family="MaplePi" encoding="UTF-8">\302\256</Font> S).</Font></Text-field>
<Text-field style="Text" layout="Normal"> <Font bold="true">2.</Font><Font encoding="UTF-8"> uma nota\303\247\303\243o para </Font><Hyperlink linktarget="Dictionary:Definition/binaryrelation" hyperlink="true"><Font style="Dictionary Hyperlink" family="Times New Roman" encoding="UTF-8">rela\303\247\303\265es bin\303\241rias</Font></Hyperlink><Font encoding="UTF-8"> em que o s\303\255mbolo para a rela\303\247\303\243o \303\251 escrito entre seus argumentos; portanto,  </Font><Font italic="true">x tem R para y</Font><Font encoding="UTF-8">  \303\251 escrito  </Font><Font italic="true">xRy</Font><Font encoding="UTF-8">. Esta \303\251 menos comum para a maioria das rela\303\247\303\265es do que </Font><Hyperlink linktarget="Dictionary:Definition/prefixnotation" hyperlink="true"><Font style="Dictionary Hyperlink" family="Times New Roman" encoding="UTF-8">nota\303\247\303\243o prefixa</Font></Hyperlink><Font encoding="UTF-8">, mas identidade \303\251 sempre escrita infixa como </Font><Font italic="true">x</Font> = <Font italic="true">y</Font><Font encoding="UTF-8">. Veja tamb\303\251m </Font><Hyperlink linktarget="Dictionary:Definition/postfixnotation" hyperlink="true"><Font style="Dictionary Hyperlink" family="Times New Roman" encoding="UTF-8">nota\303\247\303\243o postfixa</Font></Hyperlink>.</Text-field>
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