guilhem_lavaux/JaxPM
0
0
Fork 1
mirror of https://github.com/DifferentiableUniverseInitiative/JaxPM.git synced 2025-04-28 13:12:44 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

remove duplicate get_ode_fn

Browse source
This commit is contained in:
Wassim KABALAN 2024-10-22 13:38:16 -04:00
parent 82f29877f5
commit 31ca41b0a7
1 changed files with 0 additions and 22 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

22
jaxpm/pm.py
View file

@ -158,28 +158,6 @@ def make_ode_fn(mesh_shape, halo_size=0, sharding=None):
return nbody_ode
def get_ode_fn(cosmo, mesh_shape):
def nbody_ode(a, state, args):
"""
State is an array [position, velocities]
Compatible with [Diffrax API](https://docs.kidger.site/diffrax/)
"""
pos, vel = state
forces = pm_forces(pos, mesh_shape) * 1.5 * cosmo.Omega_m
# Computes the update of position (drift)
dpos = 1. / (a**3 * jnp.sqrt(jc.background.Esqr(cosmo, a))) * vel
# Computes the update of velocity (kick)
dvel = 1. / (a**2 * jnp.sqrt(jc.background.Esqr(cosmo, a))) * forces
return jnp.stack([dpos, dvel])
return nbody_ode
def get_ode_fn(cosmo, mesh_shape, halo_size=0, sharding=None):
def nbody_ode(a, state, args):