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Minor corrections in README.md

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Miguel Marco 2017-03-20 13:47:37 +01:00
parent bde0120212
commit 56e328f1d6
Signed by: mmarco
GPG Key ID: DD0114EDB7410592
2 changed files with 9 additions and 16 deletions
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4
README.md
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@ -3,7 +3,7 @@
## General description.
This is a library for computing homotopy continuation of a given root of one
dimensional sections of bivariate complex polynomials (of degree greater than 2).
dimensional sections of bivariate complex polynomials.
The output is a piecewise linear aproximation of the path followed by the root,
with the property that there is a tubular neighborhood, with square transversal
section, that contains the actual path, and there is a three times thicker tubular
@ -25,7 +25,7 @@ the [MPFR](http://www.mpfr.org/) and [GMP](https://gmplib.org/) libraries.
## Usage:
After installing the library, you can call it from any .cpp program by calling
the homotopyPath or homotopyPath_mp functions. In the file tests/sirocco_test.cpp
the `homotopyPath` or `homotopyPath_mp` functions. In the file tests/sirocco_test.cpp
you can see a simple example
### Double precission:

21
sage-sirocco_interface.pyx
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@ -20,13 +20,6 @@ cdef extern from "sirocco.h":
def devuelve(RealNumber a):
cdef mpfr_prec_t ap = mpfr_get_prec(a.value)
cdef RealNumber my_number = RealField(ap)()
mpfr_set(my_number.value, a.value, MPFR_RNDN)
return my_number
def contpath_mp(deg, values, RealNumber y0r, RealNumber y0i, int prec):
cdef int cdeg = deg
cdef mpfr_t* cvalues = <mpfr_t*> sage_malloc(sizeof(mpfr_t)*len(values))
@ -39,7 +32,7 @@ def contpath_mp(deg, values, RealNumber y0r, RealNumber y0i, int prec):
mpfr_set(cvalues[j], (<RealNumber>values[j]).value, MPFR_RNDN)
sig_off()
cdef mpfr_t y0R
cdef mpfr_t y0I
cdef mpfr_t y0I
sig_on()
mpfr_init2(y0R, prec)
mpfr_set(y0R, (<RealNumber>y0r).value, MPFR_RNDN)
@ -56,11 +49,11 @@ def contpath_mp(deg, values, RealNumber y0r, RealNumber y0i, int prec):
if rop == NULL:
raise ValueError("libsirocco could not guarantee one step")
cdef int n = mpfr_get_si(rop[0], MPFR_RNDN)
#cdef RealNumber res = RealField(53)()
cdef double res
l = []
for i in range(1, 3*n+1):
RN = RealField(prec)()
sig_on()
@ -70,7 +63,7 @@ def contpath_mp(deg, values, RealNumber y0r, RealNumber y0i, int prec):
l.append(RN)
free(rop)
return [(l[3*i], l[3*i+1], l[3*i+2]) for i in range(len(l)/3)]
@ -80,9 +73,9 @@ def contpath(deg,values,y0r,y0i):
cdef int clen = <int> len(values)
for i,v in enumerate(values):
c_values[i] = values[i]
cdef double y0R = y0r
cdef double y0I = y0i
sig_on()