Quote of the week: DIFFERENTIATION IS A SKILL. INTEGRATION IS AN ART. 

I was delighted to find this quote at the start of Seán M. Stewart‘s book “How to Integrate it“.One of the main differences between GCSE and A-level maths is the introduction of calculus. This branch of maths makes sense of the infinitely small, allowing us to deal with quantities that vary continuously (often over time)

QUOTE OF THE WEEK: “God Made the Integers. All Else is the Work of Man” 

… or so thought Leopold Kronecker (1823-1891) in his famous quote. WHY KRONECKER WAS WRONG: the integers (whole numbers) include the Positive Integers or “counting numbers” 1, 2, 3, 4 and so on: easy for a child to understand. We could quite reasonably argue they are “made by God”. But the integers also include zero,