The M-algebra completes the hierarchy of Super-Exceptional Tangent
Spaces
The M-algebra completes the hierarchy of Super-Exceptional Tangent
Spaces
The conjectured symmetries of M-theory famously involve (1.) brane-extended super-symmetry (the M-algebra) and (2.) exceptional duality-symmetry (the $\mathfrak{e}_{11}$-algebra); but little attention has been given to their inevitable combination. In this little note, we highlight (by combining results available in the literature) that the $local$ exceptional duality-symmetry (the hyperbolic involutary $\mathfrak{k}_{1,10} …