# ASK/PSK-correspondence and the r-map

## TL;DR

This paper establishes a correspondence between affine and projective special K"ahler manifolds, linking deformations in the r-map to string theory corrections and analyzing metric completeness.

## Contribution

It introduces a new affine-projective special K"ahler correspondence and relates deformations of the r-map to string theory corrections.

## Key findings

- Affine and projective special K"ahler manifolds are connected via the new correspondence.
- Deformations of the supergravity r-map relate to perturbative string corrections.
- Completeness of deformed metrics depends on undeformed metrics and deformation sign.

## Abstract

We formulate a correspondence between affine and projective special K\"ahler manifolds of the same dimension. As an application, we show that, under this correspondence, the affine special K\"ahler manifolds in the image of the rigid r-map are mapped to one-parameter deformations of projective special K\"ahler manifolds in the image of the supergravity r-map. The above one-parameter deformations are interpreted as perturbative $\alpha'$-corrections in heterotic and type-II string compactifications with $N=2$ supersymmetry. Also affine special K\"ahler manifolds with quadratic prepotential are mapped to one-parameter families of projective special K\"ahler manifolds with quadratic prepotential. We show that the completeness of the deformed supergravity r-map metric depends solely on the (well-understood) completeness of the undeformed metric and the sign of the deformation parameter.