PHI.f90 File Reference

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Functions/Subroutines
real *8 function	phi (ng, csii, csij)
	Evaluates Lengendre basis function on a specific point.

Function/Subroutine Documentation

phi()

real*8 function phi	(	integer*4	ng,
			csii,
			csij
	)

Evaluates Lengendre basis function on a specific point.

Author

Ilario Mazzieri

Date

September, 2013

Version

1.0

Parameters

[in]	ng	degree of the polynomial
[in]	csii	i-th Legendre function
[in]	csij	node where the Legendre function is evaluated
[out]	PHI	PHI^{ng}_i(xi_j) i-th (1-D) basis function of degree ng evaluate at node csij

Definition at line 30 of file PHI.f90.

      
      implicit real*8(a-h,o-z)
      integer*4 :: ng
 
      call get_legendre_value_2der(p2der2,p2,p2der,p1,p1der,ng,csii)          
      call get_legendre_value_2der(q2der2,q2,q2der,q1,q1der,ng,csij)   
 
      if(abs(csii - csij).le. 1.e-8) then
          phi = 1.d0  
      else
          phi =  (1.d0-csij**2.d0)*q2der /(ng*(ng+1.d0)*p2*(csii-csij))
          if(abs(phi) .lt. 1.e-10) then
             phi = 0.d0
          endif
      endif
 
      return

References get_legendre_value_2der(), and phi().

Referenced by compute_energy_error(), make_extint_forces(), make_loc_matrix_dg(), make_strain_rot_stress_tensor(), and phi().

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