![]() ![]() The specific light blue color of Twitter is part of its branding. Twitter has been associated with a bird mascot since almost its inception, and a different version of the bird icon began appearing on the site in 2009. Play icon The triangle icon that indicates to play The branding materials show that the bird is made by coloring in the overlaps made by dozens of concentric circles, and the rules define exactly how it can be used by third parties. Twitter’s most recent version of the bird logo has a rationale (PDF) that is way less batty, but not necessarily less studied. You may remember the 2008 Pepsi rebranding that included a design ideas PDF titled “Breathtaking”. Corporate logos for gigantic, international culture shifters like Twitter are an even bigger deal. ![]() Why the Bird MattersĬorporate logos are a big deal. This also seems to mean that Elon Musk chose just one character, typed in a regular font, as the logo to replace the decade-plus-old Twitter logo that’s recognizable around the world. Social media is on fire this week, following the very sudden rebranding of Twitter as just “X,” or, to be specific, “□.” This decorative-looking version of the letter X is part of the extended character set known as Unicode, which means it was introduced at some point with a purpose. The “Twitter X” dates back to 2001 as part of Unicode.The previous logo was refined over more than a decade and heavily regulated online.Twitter’s new logo is a Unicode character from a math alphabets subset. ![]() Why these alternate versions of s and f are necessary is a matter of protracted discussion. Life, Liberty and the pursuit of Happineſs f A method of computation any process of reasoning by the use of symbols any branch of mathematics that may involve calculation.Calculus is the diminutive form of calx (chalk, limestone). It's also related to the words calcium and chalk. Latin: a pebble or stone (used for calculation) Calculus also refers to hard deposits on teeth and mineral concretions like kidney or gall stones.The word calculus (Latin: pebble) becomes calculus (method of calculation) becomes "The Calculus" and then just calculus again. etc.Ĭalculus was invented simultaneously and independently… newton The necessity of adding a constant when integrating (anti differentiating). Proof of this is best left to the experts. the fundamental theorem of calculusĭifferentiation and integration are opposite procedures. The limit of this procedure as ∆ x approaches zero is called the integral of the function. The more rectangles (or equivalently, the narrower the rectangles) the better the approximation. The area under a curve y = f( x) can be approximated by adding rectangles of width ∆ x and height f( x). Keywords: integral, integration, indefinite integral, definite integral, limits of integration, more? the integralĪrea under the curve (area between curve and horizontal axis) ⌠ The limit of this procedure as ∆ x approaches zero is called the derivative of the function. The smaller the distance between the points, the better the approximation. The slope of the line tangent to a curve y = f( x) can be approximated by the slope of a line connecting f( x) to f( x + ∆ x). ![]() Keywords: derivative, differentiation, anything else? Instantaneous rate of change, that is, the slope of a line tangent to the curve d Only straight lines have the characteristic known as slope ![]()
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