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 Command Line Fu: surveillance with Raspberry Pi
 Let gooby do teh hoemwerk: Riemann zeta at two
 Mathematical insult gone awry
 How to get a job with 70 lines of code
 Quick tip: Veracrypt on a Raspberry Pi 2 [update: Veracrypt 1.18]
 Java bean differences
 Pade approximants: a case study (iii)
 Pade approximants: a case study (ii)
 Pade approximants: a case study (i)
 Setting up i2p running in a docker container
 Apache commonscollections vulnerability – try it at home
 Movember ’15
 Let gooby do teh hoemwerk: Green function of the twodimensional Laplace operator
 Let gooby do teh hoemwerk: BakerCampbellHausdorff identities
 Mocking Spring Data repositories
 Job application title page
 Let gooby do teh hoemwerk: SokhatskyWeierstrass identity
 Let gooby do teh hoemwerk: Riemann zeta at minus one
 TLS/SSL certificate exchange in Java
 Quick tip: Veracrypt on a Raspberry Pi 2
 Who am I?
 Guess who?
 How to get a job with 250 lines of code
 Joke’s on me I guess
 Random Java objects for testing
 My conky config
 Quick tip: changing the userbase directory in Mathematica (Linux)
 Create your own Sudoku book
 The RC4 stream cipher
 Life hack: attaching a ferro rod to the Mora plastic sheath
 The Fappening
 A hash function primer II: CRC
 A hash function primer I: SHA1
 Creating a password list for WPA/WPA2 dictionary attacks
 Ulam’s spiral in Mathematica
 Block mode of operation: why ECB is bad
 AES in Mathematica
 Strong passwords from /dev/random
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Category Archives: Math
Let gooby do teh hoemwerk: Riemann zeta at two
Based on what I read in a very old book, we show We can divide the sum into even and odd contributions One sees that In order to evaluate the right hand side of this equation we consider the function … Continue reading
Mathematical insult gone awry
Seen on average image board: Let’s try to solve it. The inner limit can be written as The limit in the exponent can be taken using the l’Hostpital rule The in the sense of the limit the denominator can be … Continue reading
Pade approximants: a case study (iii)
We are now going to explore the analytic structure of the Padé approximants for our example [1], [2]. The study (iii) The limit for the Padé approximants and exist for all . This is much stronger than the Taylor series, … Continue reading
Pade approximants: a case study (ii)
In the previous article we have seen how to calculate Padé approximations on the example of The study (ii) We are now going to see how efficient Padé’s ansatz is and compare it to the well known series representation . … Continue reading
Pade approximants: a case study (i)
This post was inspired by a lecture series of Carl Bender [1]. The case I will consider the function on the complex plane, defined by Have a look at a complex plot of it Some properties: has a a logarithmic … Continue reading
Let gooby do teh hoemwerk: Green function of the twodimensional Laplace operator
Problem Determine the Green function of the two dimensional Laplace operator Solution Recall that the Green function has to satisfy As an ansatz, we assume that depends only on the magnitude of , i.e. . Then let us use Gauss … Continue reading
Let gooby do teh hoemwerk: BakerCampbellHausdorff identities
Problem Let and be linear operators, which commute with the commutator of and , i.e. Show that the following formulae hold: which are known as the BakerCampbellHausdorff identities. They play an important rule, e.g. in quantum mechanics, whenever one deals … Continue reading