Mesoamerican Long Count calendar the use of zero as a place-holder and presents one of the earliest uses of the zero concept in history. On Maya monuments, the Long Count syntax is more complex. The date sequence is given once, at the beginning of the inscription and opens with the so-called ISIG (Introductory Series Initial Glyph) which reads "tzik-a(h) hab’ [patron of Haab' month]" ("revered was the year-count with the patron [of the month]"). Next come the 5 digits of the Long Count, followed by the Calendar Round (tzolk'in and Haab') and supplementary series. The supplementary series is optional and contains lunar data, for
Fixation (psychology) a normal childhood stage; while other post-Freudians explored the role of fixation in aggression and criminality. Fixation (psychology) "Fixation" () is a concept (in human psychology) that was originated by Sigmund Freud (1905) to denote the persistence of anachronistic sexual traits. The term subsequently came to denote object relationships with attachments to people or things in general persisting from childhood into adult life. In "Three Essays on the Theory of Sexuality" (1905), Freud distinguished the fixations of the libido on an incestuous object from a fixation upon a specific, partial "aim", such as voyeurism. Freud theorized that some humans may