Mixing maths and food in a manner that has nothing to do with your local Chinese spot's Number 44 is Islington's Equation: a global bar-diner seemingly decorated by the man who brought you hits like "the 1980s", and overlooking Screen on the Green (hence the truffle popcorn served at each seating). Some of the more interesting formulas:
The Equation of Time: Foie gras, pan-seared with wild forest berries & a port sauce "a la minute" that'll leave you wanting seconds
Schröfingers Cat: Wrap your digits around a confit shallot tart in balsamic sticky syrup (also comes with goat curd & chive ice cream)
Saint Venant Equations (you know, the Shallow Water Equations -- did you learn nothing at whatever school actually teaches that?): Pan-fried seabass w/ brioche crumbs, yuzu lime, and sweet curry cream, sided by baby spinach
Equation That Sounds Like It Will Get You Tossed in Jail: Grilled black angus ribeye with "Asian touch butter" (creamed with garlic, chilli, and spices)
Curvilinear Equation: A dessert of caramelised banana carpaccio garnished by salted caramel ice cream & chili flakes
The bar, meanwhile, presents tweaked classics, each with its own savoury garnish, such as a curry-infused-vodka Bloody sided w/ a skewer of tandoori chicken, or a Tequila Sunrise, whose orange & rosemary syrups are complemented by orange-glazed mussels spiced up with cayenne -- a powder that'll get you almost as hot as the one so popular in the 1980s.