Like kaffir lime leaves and other Southeast Asian spices, lemongrass has no substitute. It has a distinctly warm, lemon aroma, but not the sour taste of the fruit. The citrus flavor of lemongrass instead is slightly sweet, and has the familiar, but milder, bite of ginger.ike kaffir lime leaves and other Southeast Asian spices, lemongrass has no substitute. It has a distinctly warm, lemon aroma, but not the sour taste of the fruit. The citrus flavor of lemongrass instead is slightly sweet, and has the familiar, but milder, bite of ginger.
Mathematics is the classification and study of all possible patterns. Walter Warwick Sawyer, 1955. Yet another approach makes abstraction the defining criterion: Mathematics is a broad-ranging field of study in which the properties and interactions of idealized objects are examined. Wolfram MathWorld. Definitions in general reference works
There are two possibilities. First, math somehow underlies the physical world, generates it. Or second, math is a human description of how we describe certain regularities in nature, and because there is so much possible mathematics, some equations are bound to fit. As for the essence of mathematics, there are four possibilities.