That's sort of a stretch, though. The integral sign isn't a sigma, it's an S. A lowercase sigma looks like an S, but only when it's at the end of a word; more to the point, Leibniz, who came up with this notation, was surely thinking of the Latin alphabet. He used d for derivatives, after all.
Originally posted by CZeke That's sort of a stretch, though. The integral sign isn't a sigma, it's an S. A lowercase sigma looks like an S, but only when it's at the end of a word; more to the point, Leibniz, who came up with this notation, was surely thinking of the Latin alphabet. He used d for derivatives, after all.
but still, it's sigma - upper case for the summation and lower for integral. Yeah, it looks like latin s, but can be also read as greek letter.
Originally posted by Allderdice but still, it's sigma - upper case for the summation and lower for integral. Yeah, it looks like latin s, but can be also read as greek letter.
uppercase delta looks loke a triangle with one side extended and is a symbol for difference in conditions (e. g. final-initial), lowercase delta is like an "o" with a '~' on top of it and a lone connecting the two. It's also used to show the difference, but only in chemistry - it shows, which end of a molecule is polar + and which is polar -. The uppercase is used mostly in physics.
Originally posted by Allderdice uppercase delta looks loke a triangle with one side extended and is a symbol for difference in conditions (e. g. final-initial), lowercase delta is like an "o" with a '~' on top of it and a lone connecting the two. It's also used to show the difference, but only in chemistry - it shows, which end of a molecule is polar + and which is polar -. The uppercase is used mostly in physics.
Actually, my question was a joke. "What's the delta?" Greek, delta, difference, differential. (sigh)
Originally posted by demonseed I hope you are not like the coquette in Moliere's Misanthrope, Celimene, the girl who drives me, Alceste to want to leave the world.
sure, monsieur, you stand too close, but you may have my hand, si vous pleas