Deny section numbers & \ renewcommand {\ chaptername}

Question

I am writing an amsbook document in Latex. The \ chapter {On Banach Spaces} command produces something like this:

CHAPTER 1

In banach spaces

I would like him to say

CHAPTER

In banach spaces

instead of this. (There is no back chapter number.)

Why do I need it? I like the layout of amsbook, and for the first chapter I want the lead text to say “INTRODUCTION”, and then the introduction header in the next line. After this introduction, I want a normal chapter numbering.

It somehow works when I use

\renewcommand{\chaptername}{Introduction}

before the introduction of the chapter, then

\setcounter{chapter}{0}

\renewcommand\chaptername{Chapter}

immediately before the second chapter.

Unfortunately, this gives me "INTRODUCTION 1", however I want to "INTRODUCTION". So basically I like to suppress the chapter number.

(Edited.)

Answer 1

, 100%, , .

-, amsbook, , \frontmatter, \mainmatter \backmatter. \frontmatter \begin{document} \mainmatter \chapter , , , . , , , . ( - , .)

secnumdepth . - :

\setcounter{secnumdepth}{-1}
\chapter{Introduction}

...

\setcounter{secnumdepth}{1} % or 2 for numbered sections, or whatever
\setcounter{chapter}{0}
\chapter{The first chapter}

...

Answer 2

\chapter*{Introduction}

\chapter{The Title of The First Chapter}