MyWikiBiz, Author Your Legacy — Saturday October 25, 2025
Jump to navigationJump to search
250 bytes added
, 03:32, 11 March 2009
| Line 1,210: |
Line 1,210: |
| | | <math>\texttt{uv} \cdot \texttt{du~dv} ~+~ \texttt{u(v)} \cdot \texttt{du(dv)} ~+~ \texttt{(u)v} \cdot \texttt{(du)dv} ~+~ \texttt{(u)(v)} \cdot \texttt{((du)(dv))}</math> | | | <math>\texttt{uv} \cdot \texttt{du~dv} ~+~ \texttt{u(v)} \cdot \texttt{du(dv)} ~+~ \texttt{(u)v} \cdot \texttt{(du)dv} ~+~ \texttt{(u)(v)} \cdot \texttt{((du)(dv))}</math> |
| | |} | | |} |
| | + | |
| | + | <math>\operatorname{D}f</math> tells you what you would have to do, from where you are in the universe <math>[u, v],\!</math> if you want to bring about a change in the value of <math>f,\!</math> that is, if you want to get to a place where the value of <math>f\!</math> is different from what it is where you are. In the present case, where the reigning proposition <math>f\!</math> is <math>\texttt{((u)(v))},</math> the term <math>\texttt{uv} \cdot \texttt{du~dv}</math> of <math>\operatorname{D}f</math> tells you this: If <math>u\!</math> and <math>v\!</math> are both true where you are, then you would have to change both <math>u\!</math> and <math>v\!</math> in order to reach a place where the value of <math>f\!</math> is different from what it is where you are. |
| | | | |
| | <pre> | | <pre> |
| − | Df tells you what you would have to do, from where you are in the
| |
| − | universe [u, v], if you want to bring about a change in the value
| |
| − | of f, that is, if you want to get to a place where the value of f
| |
| − | is different from what it is where you are. In the present case,
| |
| − | where the reigning proposition f is ((u)(v)), the term uv du dv
| |
| − | of Df tells you this: If u and v are both true where you are,
| |
| − | then you would have to change both u and v in order to reach
| |
| − | a place where the value of f is different from what it is
| |
| − | where you are.
| |
| − |
| |
| | Figure 1.4 approximates Df by the linear form | | Figure 1.4 approximates Df by the linear form |
| | df = uv 0 + u(v) du + (u)v dv + (u)(v)(du, dv). | | df = uv 0 + u(v) du + (u)v dv + (u)(v)(du, dv). |