Answers.Body: <p>It's not possible to use batch normalization with a batch size of 1. Batch normalization requires you to calculate the variance of activation values in the current batch, and variance is undefined for a sample of size 1.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2024-02-15T17:54:07.067Z
Answers.Text: Why it is undefined? It is zero.
Answers.UserDisplayName: Antonios Sarikas
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2024-02-18T00:37:16.883Z
Answers.Text: The sample variance formula has a denominator of N - 1. When N = 1, N - 1 = 0, and division by 0 is undefined. @adosar
Answers.UserDisplayName: Johann
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Answers.CreationDate: 2023-11-06T07:40:49.920Z
Answers.LastActivityDate: 2023-11-06T07:40:49.920Z
Answers.UserDisplayName: Johann
Body: <p>I am interested in your opinion on the topic if you think that it makes sense to use batch normalization layer in a network that is trained with a batch size of 1. This is a special case as part of an experiment. What effects can be expected?</p>
  
Tags: <neural-networks><batch-normalization><residual-networks><normalisation>
Title: Does it make sense to apply batch normalization to a batch size of 1?
UserDisplayName: user3352632
ThreadText: # Does it make sense to apply batch normalization to a batch size of 1?
  
  (Asked by: username_0 on 2021-05-24)
  
  I am interested in your opinion on the topic if you think that it makes sense to use batch normalization layer in a network that is trained with a batch size of 1. This is a special case as part of an experiment. What effects can be expected?
  
  **Tags:** neural-networks, batch-normalization, residual-networks, normalisation
  
  
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  ## 1 answers
  
  ### Answer by username_1 on 2023-11-06. Score: 3
  
  It's not possible to use batch normalization with a batch size of 1. Batch normalization requires you to calculate the variance of activation values in the current batch, and variance is undefined for a sample of size 1.
  
  > **Comments:**
  > **username_2**: Why it is undefined? It is zero.  
  > **username_1**: The sample variance formula has a denominator of N - 1. When N = 1, N - 1 = 0, and division by 0 is undefined. @adosar  
  
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