In "Pushing the Limits," "CBS This Morning" profiles seemingly ordinary people doing remarkable things. Two high school students not only conquered calculus, they pulled off an achievement that can ...

Easily calculating limits, directly from an intuitively clear definition, using the same basic procedure for every type of limit, with a high level of student success. The impossible dream? Not if we ...

Inspired by recent work on proof theory for modal logic, this paper develops a cut-free labelled sequent calculus obtained by imitating Herzberger's limit rule for revision sequences as a clause in a ...