The 13th of Adar is the yahtzeit of Rabbi Nachman Goldstein (the Tcheriner Rov), one of the the greatest and most prolific scholar among Reb Noson's students. Please be sure to light a 24-hour candle and give a little tzedakah in his memory before Shabbos.
Biography taken from "Breslov Pirkei Avot":
Rabbi Nachman Goldstein (d. 1894)
Rav of Ukrainian town of Tcherin and grandson of Rabbi Aharon, the Rav of Breslov. Rabbi Nachman was one of the younger students of Reb Noson but later emerged as the greatest scholar in the Breslov community of the second generation. He edited and published Reb Noson's works and published many of his own, being the first to write commentaries specifically on Rebbe Nachman's teachings. His extant works include: Parparaot LeChokhmah (on Likutey Moharan), Rimzey HaMa'asiyot (on Sippurey Ma'asiyot), Nachat HaShulchan (on the first lesson in Likutey Moharan), Zimrat Ha'Aretz (on the theme of Eretz Yisrael in Likutey Moharan), Yekara de-Shabbata (on the theme of Shabbat in Likutey Moharan), Yerach HaEitanim (on the theme of Rosh HaShanah, Yom Kippur, and Sukkot in Likutey Moharan), and Chassidic anthologies Derekh Chassidim and Leshon Chassidim. He also produced a source index for Sefer HaMidot, tracing Rebbe Nachman's references throughout the Tanakh, Talmud, and Midrash.