Deepak Bastola
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Research Projects

Research Directions Overview

Please explore the following research directions, ordered progressively from foundational entry points to advanced statistical and machine learning frameworks:

01 · Foundational Entry

1. Context-Aware Aspect Polarity and Latent Semantic Clustering

Sublinear TF-IDF, Truncated SVD (LSA), & Local Aspect Window Polarity

SVD Subspace and Local Polarity

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02 · Spectral Graph Theory

2. Spectral Graph Connectivity and Spherical Representation Fusion

Graph Laplacians, Random-Walk Mixing, & Spherical Modality Fusion (TGSF)

Spherical Modality Geodesic

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03 · Sequence Horizons

3. Causal Renewal Ratios and Lookback Selection in Multi-Wave Time Series

Leakage-Free Renewal Ratios, Rolling-Window Overlap, & Validation Memory Selection

Multi-Wave Renewal and Lag Horizon

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04 · Global Sensitivity

4. Global Sensitivity Analysis and Surrogate Input Compression

Sobol Indices, Proportional Marginal Effects (PME), & Importance-Weighted PCA

Proportional Marginal Effects

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05 · Econometric & Option Features

5. Econometric Volatility Filtering and Analytical Option Sensitivities

Leakage-Free GARCH(1,1), Black-Scholes Greeks, & Martingale Benchmarks

GARCH Volatility and Analytical Greeks

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06 · Sparse Transformers

6. ProbSparse Self-Attention and Generative Multi-Horizon Decoding

O(L ln L) Query Sparsity, Conv1D Distilling, & One-Shot Multi-Step Decoding

ProbSparse Active Queries

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07 · Variational Deep Learning

7. Bayesian Recurrent Networks and Variational Uncertainty Calibration

ELBO Variational Inference, Total Variance Decomposition, & Temperature Scaling

Calibrated Epistemic and Aleatoric Bands

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08 · Hierarchical Bayes

8. Bayesian Conjugate Updating and Hierarchical Partial Pooling

Normal-Normal & Beta-Binomial Shrinkage, Empirical Bayes, & Fair Benchmarking

Conjugate Partial-Pooling Shrinkage

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09 · State-Space MCMC

9. Bayesian State-Space Models and MCMC Error Covariance Estimation

Kalman Filtering, Riccati Steady State, Blocked FFBS, & Online Matrix-t Filtering

Kalman-Riccati and Blocked FFBS

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10 · Advanced Frontier

10. Low-Dimensional Surface Geometry and Tempered Survey Subsampling

No-Arbitrage Convex Cones, 3D Surface Manifolds, & Horvitz-Thompson Sampling

3D Surface Manifold

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© 2026 Deepak Bastola

 

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