Julián Aguirre

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Name Julián Aguirre
Member for 3 years
Seen Apr 17 at 14:55
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Location Bilbao, Spain
Age 58
5

Questions
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4
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A G-delta-sigma that is not F-sigma?

jul 19 11 at 12:46 Goldstern 5,250●1●12●27

 
7
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0
answers
412
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G-delta of measure 0 containig the rationals.

feb 6 11 at 1:43 Julián Aguirre 1,191●5●11

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6
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4
answers
691
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When is the sum of two quadratic residues modulo a prime again a quadratic residue?

may 18 11 at 9:42 GH 14.9k●1●31●53

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5
votes
1
answer
497
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Eigenvalues of A^2+B^2 from those of A, B and A+B.

may 26 11 at 9:21 Denis Serre 18.7k●1●31●93

 

33

Answers
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33
Which math paper maximizes the ratio (importance)/(length)?
14
Mathematicians who were late learners?-list
14
What is your favorite “strange” function?
12
Are there any good computer programs for drawing (algebraic) curves?
5
What is the Implicit Function Theorem good for?
5
Why do functions in complex analysis behave so well? (as opposed to functions in real analysis)
4
Where was/is Compensated Compactness used?
4
Solutions to the diffusion equation
4
Analytical solutions of a differential equation (from Archimedes' Spiral)
4
Relative error approximation by polynomials
3
What is the longest known sequence of consecutive zeros in Pi?
3
Estimating probability of set membership
3
Finding Functional form for a given Scaling Condition
3
Decomposition of Hölder continuous functions
2
Non-absolute convergence of series with asymtotically equal coefficients
2
Graduate ODE textbook
2
Finding solutions to $f'(x) = f(x + k)$
2
finding solution to function$f^{n}(x)=f(x+k)
1
Eigenvalues convolution-type operator
1
Approximation of an integral of a concave function
1
Examples of $G_\delta$ sets
1
Explicit example of a smooth - but not analytic- closed curve without self-intersections
1
time-shifted ODEs/volume of polytopes
1
The role of completeness in Hilbert Spaces
1
Solving recurrence equation with indexes from negative infinity to positive infinity
1
Switching function for Bang-Bang nagivation
1
Closed form of a nonlinear recurrence sequence.
1
Constraints on the Fourier transform of a constant modulus function
1
What are your favorite instructional counterexamples?
1
Generalize Fourier transform to other basis than trigonometric function
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