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The differential field E[uv] specifies the changes that need to be made from each point of X in order
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The differential field <math>\operatorname{E}[uv]\!</math> specifies the changes that need to be made from each point of <math>X\!</math> in order to reach one of the models of the proposition <math>uv,\!</math> that is, in order to satisfy the proposition <math>uv.\!</math>
to reach one of the models of the proposition uv, that is, in order to satisfy the proposition uv.
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The field of changes produced by D on uv is shown in Figure 3.
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The field of changes produced by <math>\operatorname{D}\!</math> on <math>uv\!</math> is shown in Figure&nbsp;3.
    
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The differential field D[uv] specifies the changes that need to be made from each point of X in order
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The differential field <math>\operatorname{D}[uv]\!</math> specifies the changes that need to be made from each point of <math>X\!</math> in order to change the value of the proposition <math>uv.\!</math>
to change the value of the proposition uv.
      
==References==
 
==References==
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