File:B271a.png

Complex map of ArcTetration to base $\mathrm e \approx 2.71~$: function $f=\mathrm{ate}(x+\mathrm i y)$ is shown in the $x$,$y$ plane with levels $u\!=\!\Re(f)\!=\!\mathrm{const}$ and levels $v\!=\!\Im(f)\!=\!\mathrm{const}$.

The branchpoints $L\!\approx \! 0.2+1.3 \mathrm i$ and $L^*$ are fixed points of logarithm.

The cut lines go along the half-lines $y\!=\! \pm \Im(L)$, $x\!<\! \Re(L)$.

This choice of cut lines differs from that used in the first description of such function.

The ArcTetration $\mathrm{ate}$ is inverse of tetration and holomorphic solution of the Abel equation
 * $ \mathrm{ate}(\exp(z))=\mathrm{ate}(z)\!+\!1~,$
 * $ \mathrm{ate}(1)=0.$

Such a soluton is shown to be unique .

The fast C++ implementation of such a function is available below. The construction of such implementation is desctibed in.

Generation of the image
The following files are used for generation of the complex map.

Fslog.cin, the routine in C++, $\rm complex FSLOG(complex z) $ is used. For generation, it should be saved as "fslog.cin"

Conto.cin, the routine to make the contour plot. It should be saved as "conto.cin"

B271az.cc, the C++ code that includes the *.cin mentioned above and draws the mesh of the complex map, writing the output file "b271az.eps" and "b271az.pdf"

B271a.tex, the Latex code that adds the labels and, at the compilation, gives "b271a.pdf". The last was converged to the PNG format with resolution 150pixels per inch. The C++ compiler and the Latex compilers should be installed at the computer. The image was generated at Macintosh, but very similar images were generated also in Debian. Hope, the same generators can be used with other operational systems too.

The files mentioned above are in preparation for the uploading and should appear soon.

For future: should all the uploaded generators have names beginning from the capital letter?