1.2 Properties of Real Numbers
... So the number 5 is an Natural number, a whole number, an integer, a rational 25 number and a Real number same as The number – 176 would be an integer, a rational number and a Real Number ...
... So the number 5 is an Natural number, a whole number, an integer, a rational 25 number and a Real number same as The number – 176 would be an integer, a rational number and a Real Number ...
DS Lecture 9
... Example: Test if 139 and 143 are prime. List all primes up to n and check if they divide the numbers. 2: Neither is even 3: Sum of digits trick: 1+3+9 = 13, 1+4+3 = 8 so neither divisible by 3. 5: Don’t end in 0 or 5 7: 140 divisible by 7 so neither div. by 7 11: Alternating sum trick: 1-3+9 = 7 so ...
... Example: Test if 139 and 143 are prime. List all primes up to n and check if they divide the numbers. 2: Neither is even 3: Sum of digits trick: 1+3+9 = 13, 1+4+3 = 8 so neither divisible by 3. 5: Don’t end in 0 or 5 7: 140 divisible by 7 so neither div. by 7 11: Alternating sum trick: 1-3+9 = 7 so ...
On the Sum of Square Roots of Polynomials and related problems
... Theorem 1.4 (Sum of square root of ‘polynomial integers’). Suppose S = i=1 δi ai (δi ∈ {+1, −1}) such that every positive integer ai is of the form ai = X di + bi1 · X di −1 + . . . + bidi (di > 0), where X is a positive real number and bij are integers. Let B = maxi,j {|bij |} and d = maxi {di }. I ...
... Theorem 1.4 (Sum of square root of ‘polynomial integers’). Suppose S = i=1 δi ai (δi ∈ {+1, −1}) such that every positive integer ai is of the form ai = X di + bi1 · X di −1 + . . . + bidi (di > 0), where X is a positive real number and bij are integers. Let B = maxi,j {|bij |} and d = maxi {di }. I ...