We give a presentation of Pure type systems where contexts need not be well-formed and show that this is equivalent to the usual one. The main motivation for that, when we extend with computation rules, like in logical framework Dedukti, want declare constants before rules are needed check well-typedness their type.

The goal of this Research Topic was to bring together research and scholarship from two seemingly disparate fields: (1) the psychological and health benefits attained by interacting with natural environments and (2) the variables that facilitate people's recognition of environmental issues that would foster a more positive attitude toward the protection of nature. The first portion of this e-bo...

In the last 20 years, modern wide-field surveys discovered a new class of peculiar transients, which lie in luminosity gap between standard supernovae and classical novae. These transients are often called “intermediate optical transients” or “gap transients”. They usually distinguished subgroups based on their phenomenology, such as supernova impostors, intermediate red luminous this review, w...