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MathGroup Archive 2008

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Mathematica syntax

  • To: mathgroup at smc.vnet.net
  • Subject: [mg87877] Mathematica syntax
  • From: c.justin88 at gmail.com
  • Date: Sat, 19 Apr 2008 03:34:19 -0400 (EDT)

An error is yielded with the below segment:

l4**2*m1*phidd - l3**2*m2*psidd +
- l1**2*m1*thdd + l4**2*m1*thdd + l2**2*m2*thdd +
- l3**2*m2*thdd + (l1**2*mb*thdd)/3. -
- (l1*l2*mb*thdd)/3. + (l2**2*mb*thdd)/3. -
- l1*l4*m1*(phidd + 2*thdd)*Cos(phi) +
- l2*l3*m2*(psidd - 2*thdd)*Cos(psi) +
- l1*l4*m1*phid**2*Sin(phi) +
- 2*l1*l4*m1*phid*thd*Sin(phi) -
- l2*l3*m2*psid**2*Sin(psi) +
- 2*l2*l3*m2*psid*thd*Sin(psi) -
- g*l3*m2*Sin(psi - th) + g*l1*m1*Sin(th) -
- g*l2*m2*Sin(th) + (g*l1*mb*Sin(th))/2. -
- (g*l2*mb*Sin(th))/2. - g*l4*m1*Sin(phi + th).eq.0,
l4*m1*(l4*phidd + l4*thdd - l1*thdd*Cos(phi) -
- l1*thd**2*Sin(phi) - g*Sin(phi + th)).eq.0,
l3*m2*(l3*psidd - l3*thdd + l2*thdd*Cos(psi) -
- l2*thd**2*Sin(psi) + g*Sin(psi - th)).eq.0

(This is from a old version of Mathematica, I think v3)

It gives a syntax error and (psi) and (phi) are invalid.

What needs to be corrected? I'll post the whole notebook aftewards.


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