Informal (though at times slightly technical) descriptions of a few of my major research interests.

### Representing the field equations

Before a numerical relativity simulation can begin, we need to turn the physical field equations into a well-posed differential equations problem for the computer.

### Black Hole Spin

Characterizing a black-hole collision requires us to define what we mean by the angular momentum of warped space.

### Ringdown to the final state

It was long presumed that when two black holes collide, the merger remnant must settle down to a stationary black hole. Checking this required numerical relativity and some clever engineering.

### Visualizing the dynamics of spacetime

Computational relativity codes provide their results as a sea of numbers. Translating that sea of numbers into a visceral picture of spacetime dynamics requires new techniques of scientific visualization.