Unexpected Encounter on a Flight

On my flight home from Dallas I verified the timeless adage that one ought not judge a book by its cover.

As we like to do, we were the last to board our flight to minimize our time sitting in the economy section. Just ahead of us was a short woman with a substantial carryon bag stuffing popcorn into her mouth from a large bag. While we had the middle and aisle seats in our row, guess who had the window? You are correct, this very woman concealing another carryon bag under one of her jackets.

She couldn’t fit her carryon under the seat in front of her, so we convinced her to put it up in an overhead bin. With one of her jackets against the window, she fell asleep for the next ninety minutes.

With about an hour to go before arrival, she woke up and got out her laptop. I was reading from the Kindle app on my phone, looking out the corner of my eye to see what she was doing. I immediately recognized mathematic equations, matrices, theorems, and proofs. The article was about Cholesky factorization. This was interesting.

I asked her, “Are you a teacher or a student?”

“I’m a teacher.”

I told her I recognized some of what she was reading, although it had been a long time since I saw anything like this. I told her that I had an undergraduate degree in mathematics, did some programming, and then switched my career trajectory to theology and pastoral ministry.

She asked me, “Why can’t you do both?”

With a chuckle I explained that my studies enabled me to help my daughter through AP calculus and help my grandson through pre-algebra. I told her I had programmed for Bell Laboratories in the early 80’s.

She asked, “Fortran?”

“Yes, and some Cobol.”

She told me that Fortran is a programming language still used in her field, even though most current programmers use some iteration of C or Python. It just works better for some applied math applications.

She added, “See? You can still do that!”

I laughed. It’s been forty-five years since I programmed with Fortran on pre-PC, room-filling IBM mainframe computers.

I asked, “Where do you teach?” It turns out she is from Brazil, has her Ph.D. in applied mathematics from the University of Arizona, and teaches at Texas A&M.

I am so glad I broke the silence and engaged in conversation. Something in me still comes to life when I come across math and mathematicians in this world.