# how to prove that convex set is connected

#### ianchenmu

##### Member
A set $E⊂\mathbb{R}^{n}$
is convex if, given any two points $x$,$y$$∈E, the line segment {x + t(y-x) s.t. t∈[0,1]} is contained in E. Prove that if E is convex, then E is connected. #### Fernando Revilla ##### Well-known member MHB Math Helper A set E⊂\mathbb{R}^{n} is convex if, given any two points x,y$$∈E$, the line segment {$x + t(y-x)$ s.t. $t∈[0,1]$}
is contained in $E$. Prove that if $E$ is convex, then $E$ is connected.
Even more, $E$ is pathwise connected. If $x$ and $y$ are in $E$ then, the line segment $x+t(y-x): t \in [0,1]$ is a subset of $E$, so $\gamma:[0,1]\to E,\; \gamma (t)=x+t(y-x)$ is continuous path and connects $x$ to $y$.