diffusers

02247941 - Fix multistep dpmsolver for cosine schedule (suitable for deepfloyd-if) (#3314)

Fix multistep dpmsolver for cosine schedule (suitable for deepfloyd-if) (#3314) * fix multistep dpmsolver for cosine schedule (deepfloy-if) * fix a typo * Update src/diffusers/schedulers/scheduling_dpmsolver_multistep.py Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com> * Update src/diffusers/schedulers/scheduling_dpmsolver_multistep.py Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com> * Update src/diffusers/schedulers/scheduling_dpmsolver_multistep.py Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com> * Update src/diffusers/schedulers/scheduling_dpmsolver_multistep.py Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com> * Update src/diffusers/schedulers/scheduling_dpmsolver_multistep.py Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com> * update all dpmsolver (singlestep, multistep, dpm, dpm++) for cosine noise schedule * add test, fix style --------- Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com>