Fold or folding may refer to:
In the mathematical field of Lie theory, a Dynkin diagram, named for Eugene Dynkin, is a type of graph with some edges doubled or tripled (drawn as a double or triple line). The multiple edges are, within certain constraints, directed.
The main interest in Dynkin diagrams are as a means to classify semisimple Lie algebras over algebraically closed fields. This gives rise to Weyl groups, i.e. to many (although not all) finite reflection groups. Dynkin diagrams may also arise in other contexts.
The term "Dynkin diagram" can be ambiguous. In some cases, Dynkin diagrams are assumed to be directed, in which case they correspond to root systems and semi-simple Lie algebras, while in other cases they are assumed to be undirected, in which case they correspond to Weyl groups; the and
directed diagrams yield the same undirected diagram, correspondingly named
In this article, "Dynkin diagram" means directed Dynkin diagram, and undirected Dynkin diagrams will be explicitly so named.
A geological fold occurs when one or a stack of originally flat and planar surfaces, such as sedimentary strata, are bent or curved as a result of permanent deformation. Synsedimentary folds are those due to slumping of sedimentary material before it is lithified. Folds in rocks vary in size from microscopic crinkles to mountain-sized folds. They occur singly as isolated folds and in extensive fold trains of different sizes, on a variety of scales.
Folds form under varied conditions of stress, hydrostatic pressure, pore pressure, and temperature gradient, as evidenced by their presence in soft sediments, the full spectrum of metamorphic rocks, and even as primary flow structures in some igneous rocks. A set of folds distributed on a regional scale constitutes a fold belt, a common feature of orogenic zones. Folds are commonly formed by shortening of existing layers, but may also be formed as a result of displacement on a non-planar fault (fault bend fold), at the tip of a propagating fault (fault propagation fold), by differential compaction or due to the effects of a high-level igneous intrusion e.g. above a laccolith.
i'm folding
my curtains are pulled down tight
cursing back at my life
i'm folding
i'm folding
deaf, dumb, and screwed up blind
the salted tears are flooding my eyes
i'm folding
i'm folding
the ringing in my ears covers the silence
i would kiss you but you're killing me with kindness
i'm folding
i'm folding
all of these things make me who i am
and i don't even know exactly where i stand but
i'm folding
share while you can share
be with who you can be with
these things make you who you are
take time to enjoy the ones
that bring you your joy and fun
i'm talking about survival
i'm talking about my life
cause i'm folding
my curtains are pulled open wide
i'm looking forward to better times
i'm folding
i'm folding
i'm skimming my way through life
i'm folding the pages that i like