| In particular, the linear functions that we want will be linear functions in the differential variables <math>du\!</math> and <math>dv.\!</math> | | In particular, the linear functions that we want will be linear functions in the differential variables <math>du\!</math> and <math>dv.\!</math> |
− | As it turns out, there are just four linear propositions in the associated ''differential universe'' <math>\operatorname{d}U^\circ = [du, dv],</math> and these are the propositions that are commonly denoted: <math>\texttt{0}, \texttt{du}, \texttt{dv}, \texttt{du + dv},</math> in other words, \texttt{()}, \texttt{du}, \texttt{dv}, \texttt{(du,~dv)}.</math> | + | As it turns out, there are just four linear propositions in the associated ''differential universe'' <math>\operatorname{d}U^\circ = [du, dv],</math> and these are the propositions that are commonly denoted: <math>\texttt{0}, \texttt{du}, \texttt{dv}, \texttt{du + dv},</math> in other words, <math>\texttt{()}, \texttt{du}, \texttt{dv}, \texttt{(du, dv)}.</math> |