Figure 24-2 illustrates the tacit extension of the proposition or scalar field <math>f = pq : X \to \mathbb{B}</math> to give the extended proposition or differential field that we notate as <math>\varepsilon f = \varepsilon (pq) : \operatorname{E}X \to \mathbb{B}.</math> | Figure 24-2 illustrates the tacit extension of the proposition or scalar field <math>f = pq : X \to \mathbb{B}</math> to give the extended proposition or differential field that we notate as <math>\varepsilon f = \varepsilon (pq) : \operatorname{E}X \to \mathbb{B}.</math> |