The Arvada Center’s new exhibition — “I Regret to Inform You” — has a quirky title and a courageous concept. The exhibition “I Regret to Inform You” continues through Aug.. 25 at the Arvada Center. Photo by Wes Magyar, provided by Arvada Center. The entire show is built around public art projects that were carefully proposed, diligently submitted, thoroughly considered — and then completely rejected. It is a sprawling display made entirely of flops and flunkers, though it also manages to be highly entertaining, lightly informative and just a little heartbreaking. That’s because it can be heartwrenching to see all of the work that artists put into getting work: coming up with ideas, developing concepts, creating models and prototypes, then waiting endlessly as juries go through various levels of decision-making and short-listing.