Question

What do you mean by scheme refinement? Explain how it can be accomplished?

Answer 1

Answer:

Data refinement is used to convert an abstract data model (in terms of sets for example) into implementable data structures (such as arrays). ... Retrenchment is an alternative technique when formal refinement is not possible.

Answer 2

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Modern global warming is the result of an increase in magnitude of the so-called greenhouse effect, a warming of Earth's surface and lower atmosphere caused by the presence of water vapour, carbon dioxide, methane, nitrous oxides, and other greenhouse gases.