We thank the reviewers for their detailed reviews and constructive feedback. Figure 1: Red lines are GD while blue lines are NGD (Hessian-free).

How the regret scales in a finite time horizonT with problem parameters is a central theme in studies of different algorithms.

Online fraud and identity theft is a global problem that has only been exacerbated with increased online transactions amid the COVID-19 pandemic. In particular, it is estimated that Brazilian companies lose over $41 billion due to fraud every year. In an attempt to tackle this problem head on, Lincoln Ando and Raphael Melo started idwall in mid-2016. São Paulo-based idwall started as an automated background check solution and has since grown into a suite of data and identity validation and risk analysis products. For the consumer market, its "MeuID" app is aimed at users who want to change the way they identify themselves and share their data.

Lawmaker Yasuhiko Funago has a neurological disease that means he cannot speak and communicates by blinking to his carer or operating a computer system with his mouth. But he is demanding to be heard as he fights to improve the lives of people with disabilities in Japan, where many in the community complain of feeling "invisible." "I was a corporate soldier before I had amyotrophic lateral sclerosis and had hardly any opportunities to have contact with people with disabilities," Funago told a committee in November. "I had no idea how people with disabilities or illness were living," he said in the remarks read by his parliamentary aide. Such "ignorance" leads to "prejudice and discrimination," the 62-year-old warned.