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Their first calculator with a microprocessor is the Busicom 141-PF. Their entry based calculators, the Busicom LE-120A (Handy-LE) and LE-120S (Handy) , [ 6 ] were the first to fit in a pocket and also the first calculators to use an LED display.
The Cohen–Lenstra heuristics [6] are a set of more precise conjectures about the structure of class groups of quadratic fields. For real fields they predict that about 75.45% of the fields obtained by adjoining the square root of a prime will have class number 1, a result that agrees with computations. [7]
On the other hand, the maximal real subfields Q(cos(2π/2 n)) of the 2-power cyclotomic fields Q(ζ 2 n) (where n is a positive integer) are known to have class number 1 for n≤8, [8] and it is conjectured that they have class number 1 for all n. Weber showed that these fields have odd class number. In 2009, Fukuda and Komatsu showed that the ...
By 1970, a calculator could be made using just a few chips of low power consumption, allowing portable models powered from rechargeable batteries. The first handheld calculator was a 1967 prototype called Cal Tech, whose development was led by Jack Kilby at Texas Instruments in a research project to produce a portable calculator. It could add ...
Enjoy a classic game of Hearts and watch out for the Queen of Spades!
U.S. President Joe Biden on Thursday said he hoped President-elect Donald Trump would rethink his plan to impose tariffs on Mexico and Canada, saying it could "screw up" relationships with close ...
David Schwimmer doesn’t silence his phone notifications!. On Tuesday, Jan. 7, the Goosebumps: The Vanishing actor revealed on Good Morning America that funny exchanges keep him “pretty close ...
The 12 highest scoring individuals advance to the Countdown Round. The winner of this round is declared the National Champion. [13] Scholarships and prizes are awarded to the top individuals and top state teams. [13] In the past, prizes have included trips to Space Camp or to the White House to meet the current President of the United States ...