Center for Mathematical Modeling, Universidad de Chile
Beauchef 851, Torre Norte oficina 705, Santiago, RM 8370456, Chile
Universidad Adolfo Ibanez
Av. Diagonal Las Torres 2640 oficina D208, Penalolen, Santiago, RM 7941169, Chile
Contact: guido [dot] lagos [dot] barrios [at gmail]
Phone+Whatsapp: +56 9 8367 8158
Other profiles: Google Scholar, LinkedIn, Facebook, ResearchGate, Strava
Fri Dec 1, 2017 -- This week I attended the biannual Chilean Operations Research meeting, OPTIMA 2017 at Vina del Mar. It was my first time in this event and my impresion was very positive; it was specially nice to see the diversity in the Chilean OR ecosystem. Here's a group pic of the attendees.
Mon Oct 23, 2017 -- I won the Student Paper Competition of the Applied Probability Society! Much thanks to the competition committee, Jose Blanchet and John Hasenbein. Update -- some pics of the award ceremony: with the prize committee and group picture with the other finalists. Here's a post with news on the prize.
Fri Sep 22, 2017 -- My paper on discretization of Brownian motion has been nominated as one of the four finalists of the INFORMS Applied Probability Society Student Paper Competition! The authors of the three other finalist papers are: Zhengyuan Zhou of Stanford, Andrew Li of MIT, and Thodoris Lykouris and Daniel Freund of Cornell. Winning paper will be announced at APS Business Meeting at the forthcoming INFORMS Annual meeting, and the four finalist papers will be presented at session SC03. Looking forward to it!
Wed Sep 20, 2017 -- I'll be visiting the Stochastics Group at CWI (Amsterdam, The Netherlands) from Mon Nov 6th to Fri Nov 24th 2017. Thanks Bert Zwart for the invitation, and thanks to the Nucleo Milenio Modelos Estocasticos de Sistemas Complejos y Desordenados for the travel funds!
I'm a postdoc at the Center for Mathematical Modeling, University of Chile, and an associate researcher at Universidad Adolfo Ibanez (UAI) in Chile. I have a PhD in Operations Research from Georgia Tech, Atlanta, GA, USA. My advisor was prof. Ton Dieker and broadly speaking our work was about mathematical guarantees for efficiency and accuracy of algorithms that simulate stochastic processes and specific events of them. During 2016 I was a visiting student/research staff at IEOR department, Columbia University. In the past I worked with Prof. Alexander Shapiro in multi-stage stochastic programming.
I studied Mathematical Engineering (a Chilean equivalent to a USA Math B.Sc. + Applied Math M.Sc.) at the Mathematical Engineering Dept. of Universidad de Chile, and also have a M.Sc. degree in Operations Management from Industrial Engineering Dept., Universidad de Chile too.
Methodology of Simulation, Stochastic Processes, Rare-event Analysis, Data Sciences, Applied Probability, Stochastic Programming. I really enjoy programming and playing with computers and gadgets. Also bicycling and swimming.
Approximation error for discretized Levy processes about first-passage times and times of extremes
Diffusion approximations of light- and heavy-tailed random walks with Levy processes about first-passage times and times of extremes.
Reliability in power networks -- a stochastic analysis approach.
Optimization with learning applied to the open pit mining production planning problem.
On the Euler discretization error of Brownian motion about random times. [arXiv:1708.04356]
G. Lagos and A.B. Dieker, 2017.
A Dichotomy for Sampling Barrier-Crossing Events of Random Walks with Regularly Varying Tails. [arXiv:1703.00884]
G. Lagos and A.B. Dieker, 2016.
Journal of Applied Probability, Vol 54(4) pp. 1213-1232, December 2017.
Restricted risk measures and robust optimization. [DOI]
G. Lagos, D. Espinoza, E. Moreno and J. P. Vielma, 2014.
European Journal of Operations Research, 241, pp. 771-782.
Risk averse approaches in open-pit production planning under ore grade uncertainty: a Ultimate Pit study. [pdf]
D. Espinoza, G. Lagos, E. Moreno and J. P. Vielma, 2013.
Proceedings of the 36th International Symposium on Application of Computers and Operations Research in The Mineral Industry (APCOM 2013).
Robust Planning for an Open-Pit Mining Problem under Ore-Grade Uncertainty. [DOI]
G. Lagos, D. Espinoza, E. Moreno and J. Amaya, 2011.
In Proceedings of LAGOS 2011--VI Latin-American Algorithms, Graphs and Optimization Symposium, Electronic Notes in Discrete Mathematics, 37, 15-20.
Estudio de metodos de optimizacion robusta para el problema de planificacion de produccion en mineria a cielo abierto. [pdf]
M.Sc. thesis, advisors D. Espinoza and E. Moreno, 2011.
Limit distributions and random walk approximations.
INFORMS Applied Probability Society Conference, 2017 [pdf] [gif]
An introduction to Stochastic Dual Dynamic Programming (SDDP) method for multi-stage stochastic programming.
Part of a presentation with Wajdi Tekaya for the course ISyE 8813 Stochastic programming, prof. Shabbir Ahmed, 2011 [pdf]
Risk-averse open-pit mining production planning.
INFORMS Annual Meeting, 2012 [pdf] // AGCO seminar, DII, Universidad de Chile, 2011 [pdf] // LAGOS 2011 // ALIO-INFORMS Joint International Meeting 2010, Argentina
2145-S-DIO01 Advanced Simulation (Universidad Adolfo Ibanez, Spring 2017)
ISyE 3232 Stochastic manufacturing and service systems (Georgia Tech, Spring 2015)
Graduate Teaching Assistant:
ISYE 3232 Stochastic manufacturing and service systems (Georgia Tech, Summer 2014)
ISyE 6565 Probabilistic models (Georgia Tech, Fall 2012)
ISyE 3133 Engineering optimization (Gergia Tech, Summer 2012)
Javiera Barrera, Krzysztof Bisewski, Rodolfo Carvajal, Xinyun Chen, Ton Dieker, Daniel Espinoza, Cristobal Guzman, Diego Moran, Eduardo Moreno, Karthyek Murthy, Bernardo K. Pagnoncelli, Alexander Shapiro, Tonghoon Suk, Juan Pablo Vielma
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