Dear Colleagues, Some of you may be interested in a conference we are organising. Please feel free to sign up through our website at the earliest opportunity: http://hsl2017.campus.ciencias.ulisboa.pt/ *Higher Structures Lisbon (deformation theory, operads, higher categories developments & applications)* Instituto Superior Técnico, Lisbon, 24-27 July 2017 The aim of this meeting is to stimulate interaction between people, who are working in higher structures interpreted in the broad sense (to mean higher stacks, L∞- and A∞-algebras, Batalin–Vilkovisky algebras, higher category theory, operad theory and related areas). Such flavours of higher structures have appeared in differential geometry (non-abelian and higher gerbes), rational homotopy theory, algebraic topology (string structures, extended topological quantum field theories), persistent homology, and have found a number of applications in mathematical physics, such as higher gauge theory, topological quantum field theory, possibly with defects, homological methods in quantum field theory, strings and branes, topological phases of matter, among others. On behalf of the organising committee: Aleksandar Miković (GFM/Universidade de Lisboa, Universidade Lusófona) Benjamin Alarcón Heredia (CMA/Universidade Nova de Lisboa) Björn Gohla (GFM/Universidade de Lisboa) John Huerta (CAMGSD/Universidade de Lisboa) João Faria Martins (University of Leeds) Roger Picken (CAMGSD/Universidade de Lisboa) -- Kind regards, Björn Gohla [For admin and other information see: http://www.mta.ca/~cat-dist/ ]