There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

[신간의 별자리x] 우리/미술, 그리고 ‘슬픔의 박물관’

Fractional Differential Equations

Theory of fuzzy integrals and its applications

This paper investigates some controllability properties of probabilistic discrete dynamic systems. Related approximate probabilistic controllability properties are also dealt with for the case when a nominal controllable system is subject to either parametrical perturbations or unmodeled dynamics.

Manuel De la Sen

Papers

On controllability of discrete systems in probabilistic spaces