EugeneKalentev

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9 years, 358 days

MaplePrimes Activity


These are replies submitted by EugeneKalentev

@vv 

In the denominator in brackets is x to the power of 1, then it should be J=2/a^2

@vv Thank you

Looks like there's a typo, it should be like this

simplify((int(1/((a^2 + x)^(3/2)*x^(1/2)), x = 0 .. infinity) assuming (0 < a)))

@vv 

The source says so

@Kitonum 

Thank you for your answer. There was also an x ​​in the denominator in the question.

If I add it, I get infinity, although the expected answer is 2/a^2. Why does this happen?

@vv Thank you

@mmcdara Many thanks

@Christopher2222 

There was not the creation of a sample, but the determination of its size.

How, for example, is done here

https://www.surveysystem.com/sscalc.htm

 

Thank you for your answers and help.

@DSkoog 

Indeed, the problem was that this package was not installed. Thanks for the detailed answer. Everything turned out.

@Markiyan Hirnyk 

This is the problem that I can not find the help page.

Tried here, unsuccessfully http://www.maplesoft.com/support/help/search.aspx?term=haar&pr=All

Why does not it work for

[Haar(1, 2, x)], x = 0 .. 1

 

@

I do not know whether it will be useful, but the disconnect with(Operators).

See test_ek.mw

``

restart

with(PolynomialIdeals);

[`<,>`, Add, Contract, EliminationIdeal, EquidimensionalDecomposition, Generators, HilbertDimension, IdealContainment, IdealInfo, IdealMembership, Intersect, IsMaximal, IsPrimary, IsPrime, IsProper, IsRadical, IsZeroDimensional, MaximalIndependentSet, Multiply, NumberOfSolutions, Operators, PolynomialIdeal, PrimaryDecomposition, PrimeDecomposition, Quotient, Radical, RadicalMembership, Saturate, Simplify, UnivariatePolynomial, VanishingIdeal, ZeroDimensionalDecomposition, `in`, `subset`]

 

[Basis, FGLM, HilbertDimension, HilbertPolynomial, HilbertSeries, Homogenize, InitialForm, InterReduce, IsBasis, IsProper, IsZeroDimensional, LeadingCoefficient, LeadingMonomial, LeadingTerm, MatrixOrder, MaximalIndependentSet, MonomialOrder, MultiplicationMatrix, MultivariateCyclicVector, NormalForm, NormalSet, RationalUnivariateRepresentation, Reduce, RememberBasis, SPolynomial, Solve, SuggestVariableOrder, Support, TestOrder, ToricIdealBasis, TrailingTerm, UnivariatePolynomial, Walk, WeightedDegree]

(1)

packages()

[PolynomialIdeals, Groebner]

(2)

a := 8*x1^6*z1*z2^2*z5-16*x1^5*z1*z2^2*z5-4*x1^5*z2^2*z3+8*x1^5*z2*z3*z5-2*x1^4*z1*z2^2+4*x1^4*z1*z2*z5+32*x1^4*z2^2*z3-80*x1^4*z2*z3*z5-8*x1^3*z1*z2*z5-32*x1^3*z2^2*z3+192*x1^3*z2*z3*z5+5*x1^3*z2*z3+16*x1^3*z3*z5-2*x1^3*z5^2-128*x1^2*z2*z3*z5+x1^2*z1*z2-40*x1^2*z2*z3-160*x1^2*z3*z5+62*x1^2*z5^2+40*x1*z2*z3+384*x1*z3*z5-258*x1*z5^2+2*z3^2-256*z3*z5+254*z5^2+z1;

8*x1^6*z1*z2^2*z5-16*x1^5*z1*z2^2*z5-4*x1^5*z2^2*z3+8*x1^5*z2*z3*z5-2*x1^4*z1*z2^2+4*x1^4*z1*z2*z5+32*x1^4*z2^2*z3-80*x1^4*z2*z3*z5-8*x1^3*z1*z2*z5-32*x1^3*z2^2*z3+192*x1^3*z2*z3*z5+5*x1^3*z2*z3+16*x1^3*z3*z5-2*x1^3*z5^2-128*x1^2*z2*z3*z5+x1^2*z1*z2-40*x1^2*z2*z3-160*x1^2*z3*z5+62*x1^2*z5^2+40*x1*z2*z3+384*x1*z3*z5-258*x1*z5^2+2*z3^2-256*z3*z5+254*z5^2+z1

(3)

NULL

NULL


Download test_ek.mw

@Ramakrishnan 

At first glance, it does not understand the value and units of measure the density of steel.

@vv 


How do you show it

Perhaps the problem in my software, what could be the reason for such behavior Maple?

@tomleslie 

Thanks for the response and assistance

To solve this equation in the general form (without boundary conditions) tried to use a command pdsolve, but without success.

 

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