Hacker News1d ago

A polynomial autoencoder beats PCA on transformer embeddings

https://ivanpleshkov.dev/blog/polynomial-autoencoder/

#HackerNews #polynomialautoencoder #PCA #transformerembeddings #machinelearning #dataanalysis

Polynomial autoencoder

A closed-form autoencoder: PCA encoder + quadratic Ridge decoder. On FiQA it gives 4× compression of mxbai-embed-large-v1 at -0.85 p.p. NDCG@10, +2.73 p.p. over PCA. No SGD, no neural networks.