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Disentanglement by Prediction: A Twin Autoencoder with a Factored Latent Traveler
Proceedings of the 2nd Conference on Topology, Algebra, and Geometry in Data Science(TAG-DS 2026), PMLR 334(2):333-344, 2026.
Abstract
We recast disentangled representation learning as latent-space prediction with a factored predictor. Existing approaches—$\beta$-VAE, FactorVAE, $\beta$-TCVAE—cast disentanglement as a statistical property of a marginal latent distribution: they identify what factors describe an image but cannot predict how the latent should move when a factor changes. Drawing on the joint-embedding predictive architecture (JEPA) framework, in which predicting in latent space yields structured representations, we ask: what is the right structure for that predictor when the world is governed by independent generative factors? We propose the Factored-Traversal Twin Autoencoder (FT-TAE): a JEPA-inspired twin-encoder model in which a discrete factor predictor (Gumbel-Softmax) identifies what changed between two views and a learnable state-embedding table $\mathbf{E}\!\in\!\mathbb{R}^{K\times S\times d}$ composes the latent transition as a sum of per-factor displacements. Each displacement is the difference between two table lookups, so unchanged factors contribute exactly zero by construction and the additive form is order-independent without any explicit regularizer. The system is trained end-to-end with a single reconstruction loss—disentanglement emerges as a byproduct of learning accurate factored transitions, not from a marginal-statistics objective. We evaluate on 3D Shapes and MPI3D, measuring factor alignment, traversal accuracy, and compositionality.