Waldecker is originally from Aachen.^[1] She earned her doctorate (Dr. rer. nat.) at the University of Kiel in 2007, under the supervision of Helmut Bender [de],^[2] and in 2014 completed her habilitation at Martin Luther University of Halle-Wittenberg.^[1]

After postdoctoral research as a Leverhulme Fellow at the University of Birmingham, Waldecker joined Martin Luther University of Halle-Wittenberg as a junior professor in 2009. She became professor for algebra in 2015.^[1]

Waldecker is the author of the book Isolated Involutions in Finite Groups (Memoirs of the American Mathematical Society, 2013), developed from her doctoral dissertation.^[3]

With Lasse Rempe-Gillen, she is the coauthor of Primzahltests für Einsteiger: Zahlentheorie, Algorithmik, Kryptographie (Vieweg+Teubner, 2009; 2nd ed., Springer, 2016), a book on primality tests that was translated into English as Primality Testing for Beginners (Student Mathematical Library 70, American Mathematical Society, 2014).^[4]

She became a coauthor to the 2012 textbook Elementare Algebra und Zahlentheorie of Gernot Stroth [de], in its second edition (Mathematik Kompakt, Springer, 2019).

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