Clarify BM25 Documentation in Gensim Core Tutorials (Document Fix)

[r4plh]

What changes were proposed in this pull request?

This pull request corrects the documentation for the BM25 algorithm within the core tutorials of the Gensim library. The previous documentation misleadingly implied that BM25 transforms vectors into other vectors while altering their values based on feature rarity. This update provides an accurate description of BM25, highlighting its actual function as a scoring algorithm that does not manipulate the dimensionality of its input data.

Why are these changes needed?

The correction ensures the Gensim documentation accurately reflects the true nature of BM25 as a relevance scoring mechanism, not a vector transformation tool. It rectifies misconceptions and provides clarity, which is vital for users and developers relying on the Gensim documentation for implementing and understanding BM25.

File Modified

• gensim/docs/src/gallery/core/run_topics_and_transformations.py

[piskvorky]

Thanks but that doesn't sound right – the model really is a transformation. Plus the verbiage smells of LLMs.