12 March 2015

Wonders of Numbers: Adventures in Mathematics, Mind, and Meaning

Fe de Errata

Small Errata for Hardcover First Edition of Wonders of Numbers

 
page 205, boxed equation, Chapter 89, near bottom: "c" should be superscripted

page 358, Chapter 89, 2nd line in Further Exploring: "c" should be superscripted

page 216, Chapter 95, line 3, missing upside-down F symbol. Should read "F(24)" not "(24)", where the "F" is the upside-down symbol. Similarly line 2 should read "Let's define a new function F(n)."

page 262, figure drawing error. Line segment misplaced. Figure 114.1 should have a line connecting point B to the dot directly to the the left instead of the line from the point below B to the point directly to the left.

page 374, figure drawing error. Line segment misplaced. Figure 114.1 should have a line connecting point B to the dot directly to the the left instead of the line from the point below B to the point directly to the left.
 
page 94, Equation 10 towards the bottom of the page is missing an italics "i" before the "sin".
 
page 379, it says " 9 + 9 + 999 = 1000 " should be " 9/9 + 999 = 1000 " 

 

http://www.devweb.cl/mathfun

I used to have a webpage where I was posting about recreational mathematics.
As usual, it can be found at archive.org:

https://web.archive.org/web/20100416024912/http://devweb.cl/mathfun/


10 March 2015

OC4J: org.apache.xml.dtm.ref.DTMManagerDefault cannot be cast to org.apache.xml.dtm.DTMManager

When using JDK 1.6 the following CastException may be obtained:

 org.apache.xml.dtm.ref.DTMManagerDefault cannot be cast to org.apache.xml.dtm.DTMManager

This is because we are using different
 [06/03/2015 11:42:52,105] com.sample.AutenticaAction.execute(AutenticaAction.java:331) - Error = java.lang.ClassCastException: org.apache.xml.dtm.ref.DTMManagerDefault cannot be cast to org.apache.xml.dtm.DTMManager
        at org.apache.xml.dtm.DTMManager.newInstance(DTMManager.java:137)
        at org.apache.xpath.XPathContext.(XPathContext.java:102)
        at org.apache.xpath.jaxp.XPathExpressionImpl.eval(XPathExpressionImpl.java:115)
        at org.apache.xpath.jaxp.XPathExpressionImpl.eval(XPathExpressionImpl.java:99)
        at org.apache.xpath.jaxp.XPathExpressionImpl.evaluate(XPathExpressionImpl.java:184)
        at com.sample.AutenticaAction.selectSingleNode(AutenticaAction.java:59)
        at com.sample.AutenticaAction.execute(AutenticaAction.java:130)
        at org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:58)
        at org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:67)

This was replicated in OC4J 10.1.3.3.0 because we are using different xalan.jar

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The views expressed on this blog are my own and do not necessarily reflect the views of Oracle.