Lift or LIFT may refer to:
Lift is a free and open-source web framework that is designed for the Scala programming language. It was originally created by David Pollak who was dissatisfied with certain aspects of the Ruby on Rails framework. Lift was launched as an open source project on February 26, 2007 under the Apache 2.0 license. A commercially popular web platform often cited as being developed using Lift is Foursquare.
Lift is an expressive framework for writing web applications. It draws upon concepts from peer frameworks such as Grails, Ruby on Rails, Seaside, Wicket and Django. It favors convention over configuration in the style of Ruby on Rails, although it does not prescribe the model–view–controller (MVC) architectural pattern. Rather, Lift is chiefly modeled upon the so-called "View First" (designer friendly) approach to web page development inspired by the Wicket framework. Lift is also designed to be a high-performance, scalable web framework by leveraging Scala actors to support more concurrent requests than is possible with a thread-per-request server.
In the branch of mathematics called category theory, given a morphism f from an object X to an object Y, and a morphism g from an object Z to Y, a lift (or lifting) of f to Z is a morphism h from X to Z that factors through g, i.e. h ∘ g = f.
A basic example in topology is lifting a path in one space to a path in a covering space. Consider, for instance, mapping opposite points on a sphere to the same point, a continuous map from the sphere covering the projective plane. A path in the projective plane is a continuous map from the unit interval, [0,1]. We can lift such a path to the sphere by choosing one of the two sphere points mapping to the first point on the path, then maintain continuity. In this case, each of the two starting points forces a unique path on the sphere, the lift of the path in the projective plane. Thus in the category of topological spaces with continuous maps as morphisms, we have
Lifts are ubiquitous; for example, the definition of fibrations (see homotopy lifting property) and the valuative criteria of separated and proper maps of schemes are formulated in terms of existence and (in the last case) unicity of certain lifts.
(John Critchley)
Your mind is all cluttered now
But you drag yourself along somehow
Through dark dreams of that visit you in the night
Obscure fragments with broad daylight
Watch me now
What did you say about what I've done
What do you want to know, why or how come?
Haven't you learned yet that it never ends
Back and forth and around, here it comes again
CHORUS
Watch me now
And I'll lift you up if I can
Watch me nowYou're eyes are wild and your nerves exposed
But you haven't lost anything, not by a mile, not yet
Can yo uremember the good times
They can be back soon, better than before
CHORUS