The intersection of two sets A and B consists of all elements belonging to A and to B. with 4500 mg/L dextrose, with 4.0 mM L-glutamine, with 110 mg/L sodium pyruvate, without sodium bicarbonate, powder, suitable for cell culture. The set V c in the first example can be represented on a Venn diagram as follows. Dulbecco’s Modified Eagle’s Medium - high glucose, DME, DMEM. This means that our description of the elements of a set is clear and unambiguous. Table ES-2 shows the benchmarked values for all three sectors and drivers of cost decreases and increases. Which we read as ‘S is the set of odd whole numbers less than 10’.Ī set must be well defined. 0.14/Wdc decrease for residential PV, a 0.05/Wdc decrease for commercial PV, a 0.02/Wdc increase for fixed-tilt utility-scale PV, and a 0.01/Wdc increase for one-axis tracker utility-scale PV. Thus the set S above can also be written as The five elements of the set are separated by commas, and the list is enclosed between curly brackets.Ī set can also be described by writing a description of its elements between curly brackets. Which we read as ‘ S is the set whose elements are 1, 3, 5, 7 and 9’. The objects in these sets are called the elements of the set.Ī set can be described by listing all of its elements. We do a similar thing in mathematics, and classify numbers, geometrical figures and other things into collections that we call sets. For example, we speak of ‘a flock of birds’, ‘a herd of cattle’, ‘a swarm of bees’ and ‘a colony of ants’. English has many words for such collections. In our ordinary language, we try to make sense of the world we live in by classifying collections of things. A set is just a collection of objects, but we need some new words and symbols and diagrams to be able to talk sensibly about sets.
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