Presumably

I normally confine my quotation mania to my Tumblr. But this one required a bit more formatting than Tumblr allows.

The literature is not clear on whether R2m–1 may be replaced by W2m–1 but presumably the answer is well-known to experts.

—Howard Jacobowitz, “Convex Integration and the h-Principle” (Research Institute of Mathematics, Seoul)

I particularly like the absence of a comma. It somehow transmits my father’s happy combination of meticulousness and insouciance.