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+This is a port of the GNU Scientific Library to the Ruby programming language.
+
+Things from GSL you can use in ruby-gsl:
+- some error handling (ch. 3 in the GSL documentation)
+- basic mathematical functions (ch. 4)
+- complex numbers (ch. 5)
+- functions for polynomial evaluation/roots (ch. 6)
+- most "special functions" (ch. 7)
+- vectors and matrices (ch. 8)
+- permutations (ch. 9)
+- combinations (ch. 10)
+- BLAS support (ch. 12)
+- linear algebra (ch. 13)
+- eigensystems (ch. 14)
+- numerical integration (ch. 16)
+- random number generation (ch. 17)
+- quasi-random sequences (ch. 18)
+- most random number distributions (ch. 19)
+- most statistical functions (ch. 20)
+- histograms (ch. 21)
+- Monte Carlo integration (ch. 23)
+- Simulated Annealing (not reliable) (ch. 24)
+- interpolation (ch. 26)
+- numerical differentiation (ch. 27)
+- Chebyshev approximation (ch. 28)
+- series acceleration (ch. 29)
+- Discrete Hankel Transforms (ch. 30)
+- 1-dimensional root-finding (ch. 31)
+- 1-dimensional minimization (ch. 32)
+- some functions for least-squares fitting (ch. 35)
+- physical constants (ch. 37)