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[Refactor] Ranger21 optimizer #28

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merged 4 commits into from
Sep 23, 2021
Merged

[Refactor] Ranger21 optimizer #28

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af214a8
update: DESIGN
kozistr Sep 23, 2021
f6d5ee9
refactor: Ranger21 optimizer
kozistr Sep 23, 2021
715ede8
refactor: Ranger21 optimizer
kozistr Sep 23, 2021
cece79d
[skip ci] docs: Ranger article
kozistr Sep 23, 2021
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refactor: Ranger21 optimizer
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@kozistr
kozistr committed Sep 23, 2021
commit 715ede880eb6f21109b50ced8e723b33484d1f9f
3 changes: 2 additions & 1 deletion pytorch_optimizer/ranger21.py
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Expand Up @@ -104,7 +104,6 @@ def __init__(

defaults: DEFAULTS = dict(
lr=lr,
beta0=beta0,
betas=betas,
eps=eps,
weight_decay=weight_decay,
Expand Down Expand Up @@ -222,6 +221,8 @@ def step(self, closure: CLOSURE = None) -> LOSS:

bias_correction2 = 1 - beta2 ** state['step']

# second moment estimation
# using positive-negative momentum and bias correction
variance_ma = state['variance_ma']
variance_ma.mul_(beta2).addcmul_(grad, grad, value=1 - beta2)
variance_ma_sum += (variance_ma / bias_correction2).sum()
Expand Down