Research Output per year

## Fingerprint Dive into the research topics where Serge Gratton is active. These topic labels come from the works of this person. Together they form a unique fingerprint.

- 2 Similar Profiles

Quasi-Newton
Mathematics

GMRES
Mathematics

Chord or secant line
Mathematics

data assimilation
Earth & Environmental Sciences

Update
Mathematics

Sylvester Equation
Mathematics

Digital arithmetic
Engineering & Materials Science

Derivatives
Engineering & Materials Science

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Network
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## Research Output 2015 2019

## Exploiting variable precision in GMRES

Gratton, S., Simon, E., Titley-Peloquin, D. & Toint, P., Jul 2019, 19 p.Research output: Working paper

File

GMRES

Digital arithmetic

Arnoldi

Iterative Solver

Floating-point Arithmetic

## Minimization of nonsmooth nonconvex functions using inexact evaluations and its worst-case complexity

Gratton, S., Simon, E. & Toint, P., Feb 2019, Arxiv, 19 p.Research output: Working paper

File

Derivatives

Evaluation

Adaptive algorithms

Nonconvex Minimization

Inexact Methods

## Guaranteeing the convergence of the saddle formulation for weakly constrained 4D-Var data assimilation

Gratton, S., Gürol, S., Simon, E. & Toint, P. L., 1 Oct 2018, In : Quarterly Journal of the Royal Meteorological Society. 144, 717, p. 2592-2602 11 p.Research output: Contribution to journal › Article

data assimilation

erratic

matrix

method

## Quasi-Newton updates with weighted secant equations

Gratton, S., Malmedy, V. & Toint, P., 4 Jul 2015, In : Optimization Methods and Software. 30, 4, p. 748-755 8 p.Research output: Contribution to journal › Article

File

Quasi-Newton

Chord or secant line

Update

Sylvester Equation