Tags » Rigidity

Motions versus correspondences

We have understood structure as that which is preserved by allowable transformations; and so far we have always conceptualized transformations as motions. Since structure is such a central concept, let us investigate what exactly motions tell, or fail to tell us about structure. 1,723 more words

Geometry

Movie Review: the LEGO Movie

I never thought I would say this, but I LOVE the LEGO Movie.  The movie had a clever script that poked fun at the pop culture and hinted at the social tensions between collectivism and individualism, rebellion and conformity, creativity and monotony, making the film both cerebral and entertaining. 644 more words

A Geek's Life

April is Parkinson's Awareness Month


Parkinson’s disease (PD) is a chronic and progressive movement disorder, meaning that symptoms continue and worsen over time. Nearly one million people in the US are living with Parkinson’s disease.  152 more words

Information

The zoo of possible structures

In the last post we saw that for many geometric spaces, the notion of length of paths (in particular, of shortest paths, or geodesics) is actually prior to the notion of distance, even if we are not always aware of it. 888 more words

Geometry

Extrinsic structure versus intrinsic structure

In the last post, we drew a distinction between rigid spaces, such as a meter stick that doesn’t bend or stretch as you move it, and nonrigid spaces, such as a stretchable fabric. 1,461 more words

Geometry

Lent Prayer 22 - March 26

Lent Prayer 22

taking a piece of the
truth as the whole
leads our hearts
astray

forgetting all the grace
that comes our way
as if only one part… 14 more words

Poetry

The new "business casual"

I’m being worn down. Every morning a small child gathers up my pajamas lying on the bathroom floor while I shower, and shoves them at me when I exit said shower, repeating “shirt, want shirt”….my son can’t seem to handle my transformation in the morning from a rumpled lump of frump to a slightly more polished but still frumpy  member of the rat race. 39 more words