ABSTRACT
This chapter outlines how “quantitative” thinking can be developed from its very basics to an advanced level of application such as exergy-balance analyses. It demonstrates that “quantitative” thinking can enrich the quality of “qualitative” thinking, with which the “quantitative” thinking can also be enriched to a level with higher quality. The chapter lists up a variety of concepts in relation to the dual characteristics of physical entities and also to the processes. The structure is definitely associated with “geometry”, while on the other hand, function with “algebra”. Mathematics may be regarded as a kind of language with which we can discern how a portion of the nature, on which we focus as a system, functions. The chapter briefly confirms two of the very basics of mathematical symbols: zero and function, both of which necessarily carry their own meanings. It describes how mathematical modelling works.
