please join me igivi her a warm townhall welcome to eugenia cheng. [applause]. >> thank you very much and thank you for the wonderful introduction. think you, townhall seattle portland me back to talk about this book. i had a wonderful time when i came to talk about my previous book a couple of years ago, so thank you for joining us to talk about "beyond infinity". i was once called in to arbitrate a dispute between my four year old nephew and his best friend about whether infinity was a number or not his best friend said infinity is not a number because my daddy said so in my daddy is a scientist and he knows everything. my nephew sensibly focused on proving his daddy did not know everything, by reeling off my faxes daddy didn't know. [laughter] >> i love the fact that infinity is something children talk about and that adults cannot answer and for me that's a wonderful place to explore what goes on in the world, what goes on in our mind and to explore and nurture curiosity in children and it's amazing and wonderful to me that it took mathematicians

first, eugenia cheng will speak for about 35 to 45 minutes and after that we will move into time for questions.