  The Whittaker 2d growth model is a triangular continuous Markov diffusion
process that appears in many scientific contexts. It has been theoretically
intriguing to establish a large deviation principle for this 2d process with a
scaling factor. The main challenge is the spatiotemporal interactions and
dynamics that may depend on potential sample-path intersections. We develop
such a principle with a novel rate function. Our approach is mainly based on
Schider's Theorem, contraction principle, and special treatment for
intersecting sample paths.
