In this paper, we study the boundedness of non regular pseudo-differential operators on variable exponent Besov-Morrey spaces E s(·) p(·),u(·),q(·) with symbols a(x, ξ) belonging to C ℓ ∗S m 1,δ. For these symbols x-regularity is measured in H¨older-Zygmund spaces.

Notices of the AmericAN mAthemAticAl society 1879 COMMUNICATION (WM) 2 in 2018. After being approved by hundreds of attendees at the meeting, the "May 12 Initiative," often referred to simply as "May 12," rose to a global and inclusive call to action, uniting several national and continental women-in-mathematics organizations worldwide. The fact that the original idea sparked an overwhelming response, resulting in more than one hundred events being organized in its inaugural year, showcases that the initiative fulfills a strong need. For centuries women were disregarded as mathematicians, and the gender gap in mathematics remains very real. Celebratory events such as the ones supported by the May 12 Initiative bring about a crucial sense of belonging amongst women mathematicians and raise awareness throughout the entire mathematics community. The authors of this note belong to the coordinating group of the May 12 Initiative and tell the story of this international cooperation. We hope that next year you will join!

This paper deals with gender gap in Mathematics across Africa. Reducing the gender gap in Mathematics in Africa, is the major aim of African Women in Mathematics Association (AWMA) through various activities. Using macrodata from two international surveys and microdata from two African universities (Joseph Ki-Zerbo of Burkina Faso and Monastir in Tunisia), differences in favor to men in the participation of female teachers and teacher-researchers in Mathematics, Physics, Chemistry and Computer Sciences are highlighted. Some practices, considered by AWMA, aiming to reduce the Gender Gap are also evoked.

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Abstract. To supplement the already known classification of traces on classical pseudodifferential operators, we present a classification of traces on the algebras of odd-class pseudodifferential operators of non-positive order acting on smooth functions on a closed odd-dimensional manifold. By means of the one to one correspondence between continuous traces on Lie algebras and determinants on the associated regular Lie groups, we give a classification of determinants on the group associated to the algebra of odd-class pseudodifferential operators with fixed non-positive order. At the end we discuss two possible ways to extend the definition of a determinant outside a neighborhood of the identity on the Lie group associated to the algebra of odd-class pseudodifferential operators of order zero.