Math Colloquium

<picture class="lw_image"> <source type="image/webp" srcset="/live/image/gid/75/width/1000/77807_economics2_5.rev.1553012008.png 1x"/> <source type="image/png" srcset="/live/image/gid/75/width/1000/77807_economics2_5.rev.1553012008.png 1x"/> <img src="/live/image/gid/75/width/1000/77807_economics2_5.rev.1553012008.png" width="225" height="225" alt="Economics" data-max-w="225" data-max-h="225"/></picture>