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LIGHT-YEAR – the distance travelled by light in one year (equal to ~9,000,000,000,000 km). PROFESSOR RAJA GUHATHAKURTA Professor of Astronomy and Astrophysics University of California Santa Cruz, USA. . Amanda talks about her astronomy work to a class of school students over Skype. SUPERNOVA – the explosion of a star.
But what if we ask a question where the answer is some algebraic expression? The issue is that there may be many mathematically equal forms of that expression. For example, here we’re computing a derivative: And here we’re doing a factoring problem: These two answers are mathematically equal. Sometimes that’s easy to determine.
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Any integral of an algebraic function can in principle be done in terms of our general DifferentialRoot objects. Turning from calculus to algebra, we’ve added the function PolynomialSumOfSquaresList that provides a kind of “certificate of positivity” for a multivariate polynomial. But if you’re doing astronomy they can really matter.
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