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Summation
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Induction of closed form of summation
November 27th, 2020
summation
induction
What does the $i < j$ mean in $ E = -(\sum_{i<j} w_{ij}s_i s_j + \sum_i \theta_i s_i)$?
December 26th, 2020
summation
The identity $a^n-b^n=(a-b) (\sum_{i=0}^{n-1}a^ib^{n-1-i})$
April 21st, 2020
geometric-progressions
induction
summation
real-analysis
Induction: $\sum_{k=1}^{2n} (-1)^k k = n$
September 14th, 2020
summation
induction
Complex number - sum of imaginary part
September 23rd, 2020
summation
complex-numbers
how to minimize a summation containing an absolute value
December 13th, 2020
summation
optimization
derivatives
absolute-value
Changing summation in a power series
August 1st, 2022
power-series
summation
Simplify the subtraction of two summations.
August 1st, 2022
summation
discrete-mathematics
Notation for a sum over a set of variables
June 29th, 2020
notation
summation
Induction proof of the identity $\cos x+\cos(2x)+\cdots+\cos (nx) = \frac{\sin(\frac{nx}{2})\cos\frac{(n+1)x}{2}}{\sin(\frac{x}{2})}$
August 1st, 2022
summation
induction
trigonometry
Skip a number in a summation
August 1st, 2022
summation
Summation of a Sequence using previous term
August 1st, 2022
sequences-and-series
summation
puzzle
Alternating series of reciprocals of factorials
January 7th, 2020
closed-form
summation
factorial
what is the summation from i=0 to log(n)
August 1st, 2022
logarithms
summation
Alternating sum of reciprocals
April 1st, 2020
summation
Maximizing summation function with upper bound as variable.
August 1st, 2022
optimization
summation
Help with the generalized triangle inequality
August 28th, 2020
complex-analysis
summation
When can the limit of a sum be the sum of a limit?
August 1st, 2022
summation
Manipulating a Summation Series
May 26th, 2020
summation
Evaluating sums with n inside using perturbation method
August 9th, 2020
summation
How can I solve this sum? $\sum_{k=1}^{n}k2^{k-1}$
August 1st, 2022
summation
Product of sums as sum of products
February 2nd, 2020
products
summation
linear-algebra
Prove that the summation from n=0 to infinity of a^n is 1/(1-a)
August 1st, 2022
calculus
summation
infinity
Legendre polynomial recurrence relation proof using the generation function
August 1st, 2022
recurrence-relations
legendre-polynomials
derivatives
summation
How to express a conditional in a summation
August 1st, 2022
summation
What is the sum of reciprocals of first $n$ Euclid numbers
August 1st, 2022
summation
Equation with summation symbol in numerator and denominator
April 23rd, 2020
calculus
algebra-precalculus
summation
Multiplying two series together
August 1st, 2022
summation
calculus
sequences-and-series
Expected value of sum squared is sum of expected value squared?
August 1st, 2022
summation
probability-theory
statistics
probability
differentiation with summation symbol
March 19th, 2020
summation
derivatives
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